Update monitoring gapic client, re-integrate helpers#4785

Merged

theacodes merged 5 commits intogoogleapis:monitoring-autogenfrom

supriyagarg:monitoring-autogen

Apr 13, 2018

Commits on Jan 25, 2018

Add support for the Query class, and creating Pandas DataFrame.
supriyagarg
committed
Update the doc files for monitoring to reflect the autogen code.
supriyagarg
committed

Commits on Jan 31, 2018

Commits on Feb 1, 2018

Add unit tests for the manual code in Monitoring.
supriyagarg
committed