Description of problem:
gluster volume geo-replication ... create push-pem  command reports success, but the keys are not distributed to the slaves.

Version-Release number of selected component (if applicable):
3.6.1


How reproducible:
almost always

Steps to Reproduce:
1. create and start 2 x 2 gluster replicas (2 x replicas on master side, 2 x replicas on slave side)
2. generate ssh key for the root on master1 server (/root/.ssh/id_rsa), add the public key (/root/.ssh/id_rsa.pub) to the slave1 and slave2 to (/root/.ssh/authorized_keys)
3. generate common_keys on master1 using: gluster system:: execute gsec_create
4. create geo-replication: gluster volume geo-replication volume_master slave1::volume_slave create push-pem
5. on slaves: cat /root/.ssh/authorized_keys

Actual results:
on the slave1 and slave2 /root/.ssh/authorized_keys file contains only the public keys of the root@master1 (the one from step 2) and not the common_secret.pem.pub keys from step 3, hence starting the gluster geo-replication fails.

Expected results:
on both slave1 and slave2 /root/.ssh/authorized_keys should contain the common_secret.pem.pub public keys generated in step 3

Additional info: