Don't require remote.<name>.url on primary side

The pull-replication plugin running in primary doesn't perform fetch
from a replica and, therefore, it doesn't need url of any replica.
This shouldn't be mixed with the remote.<name>.apiUrl which is needed in
primary (but not in replica).

Change-Id: I30a791b78776eec07f98e1273a8af6d6891ea439
1 file changed