optionally add tags and skip-tags to the ansible command
optionally add tags and skip-tags to the ansible command

If tags or skip-tags is an empty string it can confuse the call, so only include
them if they're not empty.

Signed-off-by: Andrew Schoen <1bb641dc23c3a93cce4eee683bcf4b2bea7903a3@redhat.com>

ceph/ceph-installer,ceph/mariner-installer,ceph/ceph-installer,ceph/ceph-installer