Fix project-config-compare-xml

Change I2b04f2d94130699d6fd1c16a9b00b9c81d1ba07d was applied
at the wrong place, the failure/success messages from
project-config-compare-xml were added for project-config-gerrit.

Move them to the right place.

Change-Id: Ibd8b209589452fe53564373f3d6457850d77283d
Merge "Fix project-config-compare-xml"