Script module should return changed attribute so handlers always fire, unless "changed_when" is specified.

Fixes #4053

lib/ansible/runner/action_plugins/script.py

@@ -75,4 +75,6 @@ class ActionModule(object):
         if tmp.find("tmp") != -1 and not C.DEFAULT_KEEP_REMOTE_FILES:
             self.runner._low_level_exec_command(conn, 'rm -rf %s >/dev/null 2>&1' % tmp, tmp)
 
+        result.result['changed'] = True
+
         return result