DE291 Add configuration options and defaults for RBD image store
Adding the rest of the RBD config attributes
Add attribute for show_image_direct_url config option
Merge pull request #172 from odyssey4me/DE291

Merged automatically by jenkins after successful build test
remove selinux-context-restore GH577
Merge pull request #173 from jrcloud/de294-remove-selinux-context

Merged automatically by jenkins after successful build test