Bump used gerrit API to version 2.7-SNAPSHOT
Bump used gerrit API to version 2.7-SNAPSHOT

Change-Id: Iab778624daf45c4f4cadfe17669a21db54024a06

GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project