calamari-ctl add ability to assign role to users

Signed-off-by: Gregory Meno <gmeno@redhat.com>
doc: correct invocation for assinging role to users

Signed-off-by: Gregory Meno <gmeno@redhat.com>
calamari-ctl: add some smoke-test invocations to travis

Signed-off-by: Gregory Meno <gmeno@redhat.com>