Add notification about start jobs in gating-pipeline.

https://mirantis.jira.com/browse/PROD-28062

Change-Id: Ica2cce94ed5f12dc51ad2a84c799fbddc12925a3
diff --git a/gating-pipeline.groovy b/gating-pipeline.groovy
index 7cbdfa0..ad2ac5a 100644
--- a/gating-pipeline.groovy
+++ b/gating-pipeline.groovy
@@ -43,6 +43,7 @@
             def skipProjectsVerify = ['mk/docker-jnlp-slave']
 
             stage("test") {
+                ssh.agentSh(String.format("ssh -p %s %s@%s gerrit review %s,%s --message \'Build Started %s %s\'", defGerritPort, GERRIT_NAME, GERRIT_HOST, GERRIT_CHANGE_NUMBER, GERRIT_PATCHSET_NUMBER, BUILD_URL, STARTED_STATS))
                 //check Code-Review
                 if (!gerrit.patchsetHasApproval(gerritChange.currentPatchSet, "Code-Review", "+")) {
                     throw new Exception('Change don\'t have a CodeReview+1, reject gate')