Update the configuration options in the karbor.conf.sample
Update the configuration options in the karbor.conf.sample

The configuration options about plugins should not be set to
karbor.conf. These options should be set to provider.conf.
This patch will update the default options of karbor.conf.sample.

Change-Id: I11c9376640d099dd31d229e2171217443ba3a6ec

openstack/smaug,openstack/smaug