Sync latest cfg from oslo-incubator

Changes include:

  c5984ba Move logging config options into the log module
  7cf016a Fixing the trim for ListOp when reading from config file

The most significant change is that cfg no longer provides logging
config options as these have been moved to the log module which
keystone does not yet use. Define these options in keystone.config
where they are used since pulling in oslo logging isn't appropriate
if we're not going to use it.

Change-Id: I3913ea54465658d93dc56e014dfe5d911b0541d6
Update .coveragerc

Set up proper source and omit options.

Change-Id: Ia45165a3fa5d073df362b37f8ee5e4fd5e529c21
Implements: blueprint update-coveragerc
Merge "Sync latest cfg from oslo-incubator"
Merge "Update .coveragerc"