Fix the password print in cinder-volume.log issue
Fix the password print in cinder-volume.log issue

In cinder.conf replication_device may contains replication
remote device password,and in cinder.volume.driver secret
is not set 'true' for replication_device, So when start cinder
volume service,replication remote device sensitive information
will print in cinder volume log, it will cause some security
problems.

This commit fixes that by setting secret=true for replication_device
in cinder.volume.driver.

Change-Id: I710b557768ca3df0303d70b43b3c74247eed6b24
Closes-Bug: #1617534

openstack/cinder,eharney/cinder,NetApp/cinder,j-griffith/cinder,ge0rgi/cinder,Nexenta/cinder,Datera/cinder,cloudbase/cinder,Hybrid-Cloud/cinder,Nexenta/cinder,phenoxim/cinder,phenoxim/cinder,eharney/cinder,mahak/cinder,j-griffith/cinder,openstack/cinder,cloudbase/cinder,mahak/cinder,Datera/cinder,NetApp/cinder,Hybrid-Cloud/cinder