Hide secrets from puppet logs

Currently secrets like rabbit_password, admin_password or database connection
are laked in puppet logs when changed. This commit changes neutron_*_config and 
neutron_*_ini types adding a new parameter that triggers obfuscation the values
in puppet logs.

Change-Id: I7dc59ce9580bfb1d4afdfbced668d0cb2979458a
Closes-Bug: #1328448
(cherry picked from commit c7f8696a3abfa5771d811f6d6c35f5a1f2ba02ec)