Promote the gate-trove-functional-dsvm-mysql job

The gate-trove-functional-dsvm-mysql job is now running the trove tests
successfully, so proote it from being an experimental job to an actual
check and gate job.

Change-Id: I6cf120ab787596a3890708ec4c6d9113f41bc1d8
Merge "Promote the gate-trove-functional-dsvm-mysql job"