glusterd/geo-rep: Creating .ssh dir with right ownership

Also adding -P option to the usage of df for portability in gverify.sh

Change-Id: I0be19d26ea63769a934c6ccbfc04ef80768ebc9a
BUG: 1099041
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/7812
Reviewed-by: Kotresh HR <khiremat@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Venky Shankar <vshankar@redhat.com>
Tested-by: Venky Shankar <vshankar@redhat.com>
Reviewed-by: Aravinda VK <avishwan@redhat.com>