Fix exception valid_actions value
While doing zanata translations for tacker,
noticed the exception message was not using correct
valid_actions values due a typo.
@@ -269,7 +269,7 @@ class VnfPolicyNotFound(NotFound):
class VnfPolicyActionInvalid(BadRequest):
message = _("Invalid action %(action)s for policy %(policy)s, "
- "should be one of %(valid_acions)s")
+ "should be one of %(valid_actions)s")
class VnfPolicyTypeInvalid(BadRequest):
