Skip know_host check for ipa-replica-conncheck

When IPA replica is installed and the master machine record is not
in ~/.ssh/known_hosts, ipa-replica-install will prompt user to answer
a question about adding a host to this file.

This has, however, a potential to break automatic tests.
ipa-replica-conncheck should not require any further user interaction
when all mandatory options are filled.

https://fedorahosted.org/freeipa/ticket/1305

install/tools/ipa-replica-conncheck

@@ -330,7 +330,9 @@ def main():
 
             stderr = ''
             remote_addr = "%s@%s" % (user, options.master)
-            (stdout, stderr, returncode) = ipautil.run(['/usr/bin/ssh', remote_addr,
+            (stdout, stderr, returncode) = ipautil.run(['/usr/bin/ssh',
+                '-q', '-o StrictHostKeychecking=no',
+                '-o UserKnownHostsFile=/dev/null', remote_addr,
                 "/usr/sbin/ipa-replica-conncheck " + " ".join(remote_check_opts)],
                 env={'KRB5_CONFIG':KRB5_CONFIG, 'KRB5CCNAME' : CCACHE_FILE},
                 raiseonerr=False)