Fix deploy_helper join exception on no release.

(cherry picked from commit 64458bc9a1)

lib/ansible/modules/web_infrastructure/deploy_helper.py

@@ -316,7 +316,10 @@ class DeployHelper(object):
         if not self.release and (self.state == 'query' or self.state == 'present'):
             self.release = time.strftime("%Y%m%d%H%M%S")
 
-        new_release_path = os.path.join(releases_path, self.release)
+        if self.release:
+            new_release_path = os.path.join(releases_path, self.release)
+        else:
+            new_release_path = None
 
         return {
             'project_path':             self.path,