Fix integration-cli suite setup requirements

This PR moves the testRequires check from within setupRegistry
and setupNotary to when the Suite itself starts up.

This fixes a bug where testRequires() in setupRegistry() would
succeed and start registry, but testRequires() in setupNotary()
would fail. This immediately exits the goroutine with registry
still running.

Signed-off-by: Christopher Jones <tophj@linux.vnet.ibm.com>