Do not add ipa-ca records on CA-less installs

ipa-dns-install crashed when it was run on a CA-less server.

https://fedorahosted.org/freeipa/ticket/3617
Fix ipa-ca DNS name creation

Previous fix (6d06a7e) did not work properly on a CA-less replica
with CA-powered master.

https://fedorahosted.org/freeipa/ticket/3617
Update translations from Transifex