cli: do not ask for credentials if they specified via cli options
cli: do not ask for credentials if they specified via cli options

Change-Id: If02bcd2adaae77a86eeb94d441b8435be949ac44
Signed-off-by: Michael Pasternak <af5566a40fc9757136fd9da9ca5e2dbdd9b039eb@redhat.com>

oVirt/ovirt-engine-cli,oVirt/ovirt-engine-cli