Hide secrets from puppet logs

Currently secrets like rabbit_password or admin_password are displayed in
puppet logs when changed. This commit changes glance_*_config and
glance_*_ini types adding a new parameter that triggers obfuscation of
the values in puppet logs.

Change-Id: I31f974a9afadef42939ee092ecba3b8f4333bb8b
Closes-Bug: #1328448
Merge "Hide secrets from puppet logs"