azure-sdk-for-java: [BUG] SecretClientBuilder : java.lang.NoClassDefFoundError: reactor/netty/tcp/ProxyProvider$TypeSpec

Describe the bug The above issue is when we tried to use azure sdk for keyvaults and instantiate SecretClient using SecretClientBuilder.

Issue in com.azure: azure-security-keyvault-secrets 4.2.x in combination with io.projectreactor.netty:reactor-netty:jar:1.0.3

Exception or Stack Trace 2021-03-18T18:58:53.6444488Z Caused by: java.lang.NoClassDefFoundError: reactor/netty/tcp/ProxyProvider$TypeSpec 2021-03-18T18:58:53.6445215Z at com.azure.core.http.netty.NettyAsyncHttpClientBuilder.lambda$build$7(NettyAsyncHttpClientBuilder.java:142) 2021-03-18T18:58:53.6446059Z at reactor.netty.http.client.HttpClient.tcpConfiguration(HttpClient.java:1465) 2021-03-18T18:58:53.6446779Z at com.azure.core.http.netty.NettyAsyncHttpClientBuilder.build(NettyAsyncHttpClientBuilder.java:122) 2021-03-18T18:58:53.6447555Z at com.azure.core.http.netty.NettyAsyncHttpClientProvider.createInstance(NettyAsyncHttpClientProvider.java:17) 2021-03-18T18:58:53.6448328Z at com.azure.core.implementation.http.HttpClientProviders.createInstance(HttpClientProviders.java:51) 2021-03-18T18:58:53.6449000Z at com.azure.core.http.HttpClient.createDefault(HttpClient.java:50) 2021-03-18T18:58:53.6449617Z at com.azure.core.http.HttpClient.createDefault(HttpClient.java:40) 2021-03-18T18:58:53.6450243Z at com.azure.core.http.HttpPipelineBuilder.build(HttpPipelineBuilder.java:62) 2021-03-18T18:58:53.6450942Z at com.azure.security.keyvault.secrets.SecretClientBuilder.buildAsyncClient(SecretClientBuilder.java:161) **2021-03-18T18:58:53.6451836Z at com.azure.security.keyvault.secrets.SecretClientBuilder.buildClient(SecretClientBuilder.java:104)

To Reproduce Using below dependencies spring boot version : 2.4.2 in combination with

 <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-security-keyvault-secrets</artifactId>
      <version>4.2.x</version>
      <exclusions>
      </exclusions>
  </dependency>

    <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-identity</artifactId>
      <version>1.2.0</version>
    </dependency>

and try to build SecretClientBuilder object

Code Snippet

 new SecretClientBuilder()
        .vaultUrl(keyVaultUri)
        .credential(new DefaultAzureCredentialBuilder().build())
        .buildClient();

Maven dependency tree:

+- com.azure:azure-security-keyvault-secrets:jar:4.2.0:compile
[INFO] |  +- com.azure:azure-core:jar:1.7.0:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.11.4:compile
[INFO] |  |  +- com.fasterxml.jackson.dataformat:jackson-dataformat-xml:jar:2.11.4:compile
[INFO] |  |  |  +- com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.11.4:compile
[INFO] |  |  |  +- org.codehaus.woodstox:stax2-api:jar:4.2.1:compile
[INFO] |  |  |  \- com.fasterxml.woodstox:woodstox-core:jar:6.2.3:compile
[INFO] |  |  +- io.projectreactor:reactor-core:jar:3.4.2:compile
[INFO] |  |  |  \- org.reactivestreams:reactive-streams:jar:1.0.3:compile
[INFO] |  |  \- io.netty:netty-tcnative-boringssl-static:jar:2.0.36.Final:compile
[INFO] |  \- com.azure:azure-core-http-netty:jar:1.5.4:compile
[INFO] |     +- io.netty:netty-handler:jar:4.1.58.Final:compile
[INFO] |     |  +- io.netty:netty-common:jar:4.1.58.Final:compile
[INFO] |     |  +- io.netty:netty-resolver:jar:4.1.58.Final:compile
[INFO] |     |  +- io.netty:netty-transport:jar:4.1.58.Final:compile
[INFO] |     |  \- io.netty:netty-codec:jar:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-handler-proxy:jar:4.1.58.Final:compile
[INFO] |     |  \- io.netty:netty-codec-socks:jar:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-buffer:jar:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-codec-http:jar:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-codec-http2:jar:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-transport-native-unix-common:jar:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-transport-native-epoll:jar:linux-x86_64:4.1.58.Final:compile
[INFO] |     +- io.netty:netty-transport-native-kqueue:jar:osx-x86_64:4.1.58.Final:compile
[INFO] |     **\- io.projectreactor.netty:reactor-netty:jar:1.0.3:compile**
[INFO] |        +- io.projectreactor.netty:reactor-netty-core:jar:1.0.3:compile
[INFO] |        |  +- io.netty:netty-resolver-dns:jar:4.1.58.Final:compile
[INFO] |        |  |  \- io.netty:netty-codec-dns:jar:4.1.58.Final:compile
[INFO] |        |  \- io.netty:netty-resolver-dns-native-macos:jar:osx-x86_64:4.1.58.Final:compile
[INFO] |        +- io.projectreactor.netty:reactor-netty-http:jar:1.0.3:compile
[INFO] |        \- io.projectreactor.netty:reactor-netty-http-brave:jar:1.0.3:runtime
[INFO] |           \- io.zipkin.brave:brave-instrumentation-http:jar:5.13.3:runtime
[INFO] |              \- io.zipkin.brave:brave:jar:5.13.3:runtime
[INFO] |                 \- io.zipkin.reporter2:zipkin-reporter-brave:jar:2.16.3:runtime
[INFO] |                    \- io.zipkin.reporter2:zipkin-reporter:jar:2.16.3:runtime
[INFO] |                       \- io.zipkin.zipkin2:zipkin:jar:2.23.2:runtime

```

**Expected behavior**
The SecretClientBuilder has instatiated the SecretClient sucessfully.

**Screenshots**
NA


**Setup (please complete the following information):**
 - OS: Windows
 - IDE : Intellij
 -   azure-security-keyvault-secrets 4.2.0

**Additional context**
Add any other context about the problem here.

**Fix for now**
  ```
  <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-security-keyvault-secrets</artifactId>
      <version>4.2.x</version>
      <exclusions>
      </exclusions>
    </dependency>
    <dependency>
    <groupId>io.projectreactor.netty</groupId>
    <artifactId>reactor-netty</artifactId>
    <version>0.9.12.RELEASE</version>
    </dependency>
```

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