Merge pull request #20467 from markllama/fix-tag-again

invert tag string selection logic

Author: openshift-merge-robot

.tito/lib/origin/tagger/__init__.py

@@ -40,7 +40,7 @@ def _tag_release(self):
         super(OriginTagger, self)._tag_release()
 
     def _get_tag_for_version(self, version, release=None):
-        if release:
+        if release is None:
             return "v{}".format(version)
         else:
             return "v{}-{}".format(version, release)