cli: connect --help will log the user out of the disconnected cli

Running connect --help in a disconnect cli will print help message
and log user off cli.

This patch uses a regex to convert command --help to
help command and execute it.

Change-Id: Icffe101260edc5072aec4c8d2a6df0f763591f8b
Bug-Url: https://bugzilla.redhat.com/890340
Signed-off-by: Ravi Nori <rnori@redhat.com>