cli: change NoCertificatesError message to ask only for ca_file
cli: change NoCertificatesError message to ask only for ca_file

Change-Id: I14b73f34328e748a71a0304797c39c3ca9c1089a
Signed-off-by: Michael Pasternak <af5566a40fc9757136fd9da9ca5e2dbdd9b039eb@redhat.com>

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