Cloned from upstream: https://pagure.io/freeipa/issue/6813

FreeIPA configured with CA on the master and no CA on the replica.
If I renew the IPA RA agent on the master, then try to renew the same on the replica, the operation fails on the replica:

    Request ID '20170324090012':
	status: CA_UNREACHABLE
	ca-error: Error 7 connecting to http://replica.example.com:8080/ca/ee/ca/profileSubmit: Couldn't connect to server.
	stuck: no
	key pair storage: type=FILE,location='/var/lib/ipa/ra-agent.key'
	certificate: type=FILE,location='/var/lib/ipa/ra-agent.pem'
	CA: dogtag-ipa-ca-renew-agent
	issuer: CN=Certificate Authority,O=EXAMPLE.COM
	subject: CN=IPA RA,O=EXAMPLE.COM
	expires: 2019-03-14 08:53:32 UTC
	key usage: digitalSignature,nonRepudiation,keyEncipherment,dataEncipherment
	eku: id-kp-serverAuth,id-kp-clientAuth
	pre-save command: /usr/libexec/ipa/certmonger/renew_ra_cert_pre
	post-save command: /usr/libexec/ipa/certmonger/renew_ra_cert
	track: yes
	auto-renew: yes

Note that the agent tries to contact Dogtag on the replica but Dogtag is only installed on the server. The agent should rather try to download the certificate from LDAP.

The issue happens because of a bug in /usr/libexec/certmonger/dogtag-ipa-ca-renew-agent-submit, where the code checks if the certificate is replicated in order to either request renewal or download the renewed cert:

    def is_replicated():
        return not get_nickname()

The code should do the opposite: ie a cert is replicated if get_nickname() returns a name.