conditionally config gpgcheck in cephdeploy.conf
conditionally config gpgcheck in cephdeploy.conf

cephdeplo.conf has custom repos that it will push to remote
nodes.  we also want to make sure that GPG checking for those
repos is configurable.

Signed-off-by: Travis Rhoden <e5e44d6dbac12e32e01c3bb8b67940d8b42e225b@redhat.com>

trhoden/ice-setup,ceph/ice-setup