Comment 4 for bug 1521925

Reviewed: https://review.openstack.org/257190
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=faacb526969d3ed8575fff0802b469d3ccdad264
Submitter: Jenkins
Branch: stable/liberty

commit faacb526969d3ed8575fff0802b469d3ccdad264
Author: huangtianhua <email address hidden>
Date: Thu Dec 3 09:45:35 2015 +0800

    Make sure update successful if there is encrypt param

    Don't append the param in env.encrypted_param_names again
    when encrypt hidden paramters, otherwise an error will raise
    when get template from db-object before decrypting.

    Closes-Bug: #1521925
    Change-Id: I4bdaa3391863cd18a451da4eee0cb9314c0057c5
    (cherry picked from commit 2fe6deee9b2dd0d94d860b1a5fad443d865d1327)