Description of problem:
The geo-rep start with ':' instead of '::' in the slave URL gives completely unrelated and incorrect error message.

Version-Release number of selected component (if applicable):
glusterfs-3.4.0.44rhs-1.el6rhs.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Run geo-rep start with ':' in the slave url

Actual results:

With ':::'

[root@pythagoras ]# gluster v geo  master euclid:::slave start
Session between master and euclid:::slave has not been created. Please create session and retry.
geo-replication command failed

With ':'

[root@pythagoras ]# gluster v geo  master euclid:slave start
euclid::slave is not empty. Please delete existing files in euclid::slave and retry, or use force to continue without deleting the existing files.
geo-replication command failed


Proper url '::'

[root@pythagoras ]# gluster v geo  master euclid::slave start
Starting geo-replication session between master & euclid::slave has been successful


Expected results:
Session between master and euclid:slave has not been created. Please create session and retry.
geo-replication command failed

Additional info: