[RFE] Gluster CLI compatibility

[aravindavk]

Provide compatibility to Gluster commands. Output/XML compatibility is not in this scope.

Examples:

$ kadalu gluster-cmd --pool=PROD gluster peer probe node1.example.com
Executing below Kadalu command.

  kadalu node add DEV/node1.example.com

Is this correct? (Y/N):
$
$ kadalu gluster-cmd --pool=PROD gluster volume create vol1 \
    replica 3 \
    node1.example.com:/exports/vol1/storage1 \
    node2.example.com:/exports/vol1/storage2 \
    node3.example.com:/exports/vol1/storage3
Executing below Kadalu command.

  kadalu volume create PROD/vol1 \
    --no-start \
    replica 3  \
    node1.example.com:/exports/vol1/storage1 \
    node2.example.com:/exports/vol1/storage2 \
    node3.example.com:/exports/vol1/storage3

Is this correct? (Y/N):

Don't execute the commands directly unless --mode=script is given.

[sac]

A small nit. (Y/n) capitalize the default action. When a user enters return without typing anything, the default action is taken.