pipelines: Cannot use resource request based on PipelineParam

We are trying to build a generic pipeline that will have some steps with configurable resources. This is needed because based on what is being run it might need more or less cpu, memory and etc.

Consider the pipeline described bellow:

@dsl.pipeline(
    name='Generic Pipe'
)
def pipeline_definition(memory_request: str = '8G', cpu_request: str = '4'):
    op = ContainerOp(...)

    op.set_memory_request(memory_request)\
      .set_cpu_request(cpu_request)

This pipeline will fail to match the expected resource Regex and would not be successfully uploaded. This is what would be generated on the yaml file:

 resources:
    requests:
        cpu: '{{inputs.parameters.cpu-request}}'
        memory: '{{inputs.parameters.memory-request}}'

And here is the error:

kfp_server_api.rest.ApiException: (500)
Reason: Internal Server Error
HTTP response headers: HTTPHeaderDict({'Server': 'nginx/1.15.6', 'Date': 'Mon, 26 Aug 2019 21:46:03 GMT', 'Content-Type': 'text/plain; charset=utf-8', 'Content-Length': '601', 'Connection': 'keep-alive', 'x-powered-by': 'Express', 'x-envoy-upstream-service-time': '55'})
HTTP response body: {"error_message":"Error creating pipeline: Create pipeline failed: Failed to get parameters from the workflow: InvalidInputError: Failed to parse the parameter.: error unmarshaling JSON: while decoding JSON: quantities must match the regular expression '^([+-]?[0-9.]+)([eEinumkKMGTP]*[-+]?[0-9]*)$'","error_details":"Error creating pipeline: Create pipeline failed: Failed to get parameters from the workflow: InvalidInputError: Failed to parse the parameter.: error unmarshaling JSON: while decoding JSON: quantities must match the regular expression '^([+-]?[0-9.]+)([eEinumkKMGTP]*[-+]?[0-9]*)$'"}