Support catalog delete using the CLI.
Merge pull request #1274 from pulp/jortel-clear-catalog-command

Support catalog delete using the CLI.
Merge branch '2.5-testing' into 2.5-dev
Automatic commit of package [pulp] release [2.5.0-0.15.rc].
Automatic commit of package [pulp-nodes] release [2.5.0-0.15.rc].
Merge branch '2.5-testing' into 2.5-dev
Merge branch 'master' of https://github.com/pulp/pulp