CI: Allow ranCommitID to be "develop"

This will be used to pull images with the tag "develop" (i.e., without a
commit ID).

ci-scripts/cls_containerize.py

@@ -70,6 +70,8 @@ def CreateWorkspace(host, sourcePath, ranRepository, ranCommitID, ranTargetBranc
 	return ret.returncode == 0
 
 def CreateTag(ranCommitID, ranBranch, ranAllowMerge):
+	if ranCommitID == 'develop':
+		return 'develop'
 	shortCommit = ranCommitID[0:8]
 	if ranAllowMerge:
 		# Allowing contributor to have a name/branchName format