fladle: Configuration option to ignore failures

Gradle 6.1 is released with the ability to check the exit code for JavaExec tasks! https://docs.gradle.org/6.1/release-notes.html

https://github.com/gradle/gradle/pull/10763

I reopened https://github.com/Flank/flank/issues/602

Current idea is if ignoreExitValue is set then we’ll always return a 0 exit code.

@runningcode Should ignoreExitValue be a part of flank extension?

In case anyone stumbles into this Github issue in the future. I would not recommend ignoring flanks exit value. If a matrix fails for any reason other than the test itself failing (bad matrix, device failure, infrastructure overload) than the failure will not appear in the junit report. This is a dangerous false positive situation in the test reporting system in flank. See this issue for more details: https://github.com/TestArmada/flank/issues/457

Kotlin needs a bit of help to figure out the type of the execFlank task. Please try the following kts compatible™ snippet and let me know how it goes. 😃

afterEvaluate {
  tasks.named("execFlank", JavaExec::class.java).configure {
    isIgnoreExitValue = true
  }
}