fixes #6619 / BZ 1111733 - Lifecycle Environment: do not update label

The lifecycle environment label was being 'auto updated' when a user
would change the environment name.  This should not be done as the
label is intended to be read-only.
Merge pull request #4427 from bbuckingham/issue-6619

fixes #6619 / BZ 1111733 - Lifecycle Environment: do not update label