Add possibility to use comments in 'tag-git-repos'

   * Usefully, to have all required repos in GIT_REPO_LIST, even if they
     should be tagged manually.

Change-Id: I5ca851293ad1507817a717438f980c8901178453
diff --git a/tag-git-repos.groovy b/tag-git-repos.groovy
index 52344d1..550a2a1 100644
--- a/tag-git-repos.groovy
+++ b/tag-git-repos.groovy
@@ -28,6 +28,9 @@
             def repos = GIT_REPO_LIST.tokenize('\n')
             def repoUrl, repoName, repoCommit, repoArray
             for (repo in repos){
+                if(repo.startsWith('#'))
+                  common.warningMsg("Skipping:" + repo.toString())
+                  continue
                 if(repo.trim().indexOf(' ') == -1){
                     throw new IllegalArgumentException("Wrong format of repository and commit input")
                 }
@@ -43,4 +46,4 @@
             throw e
         }
     }
-}
\ No newline at end of file
+}