[feature] flag to unpause pipelines

[trobert2]

It would be nice to have a way to unpause a pipeline after creating it. The lack of this feature means that we have to create one more fly resource and execute that command. Since we do that, there is no reason to use this resource.

I propose having a flag called unpause in the configuration of each pipeline with a default to false:

      pipelines:
      - name: my-pipeline
        team: team-1
        config_file: path/to/config/file
        unpause: true
        vars_files:
        - path/to/optional/vars/file/1
     - name: my-second-pipeline
        team: team-2
        config_file: path/to/config/file2
        vars_files:
        - path/to/optional/vars/file/2

[marco-m]

It looks like this ticket can be closed as DONE :-)