Add description and example of stub Measure resource necessary to kick-off refresh of dQM content

[rob-reynolds]

The refresh operation requires a base Measure resource in order to run for dQMs but the details are shop knowledge.

It would be useful if those requirements were documented and there was an example.

The alternative would be to include prompting for those minimal set of requirements as part of the refresh operation. The operation would detect the minimal requirements have not been met and ask the user to supply them. This would continue until the minimal requirements were met.