Update oslo-incubator apiclient.exceptions modules

Changes -
 * Remove None for dict.get()
 * Handle 300 status code in common HTTPClient

Change-Id: Ib6db9e1788ae5ca3f0f7282dc348503240cfd0b8
Update oslo-incubator cliutils module

Changes -
 * Revert "Removed set_loaded() method from Resource class"
 * Remove None for dict.get()

Change-Id: If71a4acc52fcc4e3015c41af50aa827bda824a09
Merge "Update oslo-incubator apiclient.exceptions modules"
Merge "Update oslo-incubator cliutils module"