Log config options with oslo.config
Log config options with oslo.config

This removes some custom Cinder code which
handles filtering secret config options in a flaky way.

Filtering will now be based on the "secret=True" option
flag.

Related-Bug: #1750074
Change-Id: I1c404b057d1471c85bd7eaf5c096f5912293460a

Datera/cinder,Datera/cinder