plan subcommand's docs are misleading

[davidxia]

The help message for roer pipeline-template plan are misleading. It says

validate a pipeline template and or plan a configuration",

		Given a pipeline template configuration, a plan operation
		will be run, with either the errors being returned or the
		final pipeline JSON that would be executed. 

But the output of this command isn't the final pipeline that would be produced compared to roer pipeline save. plan's output is missing configuration like triggers. What's the intended use of plan and what would an accurate help message be?

See https://gist.github.com/davidxia/462dfa23b63528ddb12b9caf2cbda039#file-result-of-publishing-and-planning for an example of the difference between plan and save.

[davidxia]

cc @danielhan @caipre in case you get tripped up by this.