fixed a few misspellings. no code changes present

Change-Id: Ia1a771301e9f1becbbffd8afd7eb68bec9696ef8
BUG: 1075417
Signed-off-by: arvindch <achembarpu@gmail.com>
Reviewed-on: http://review.gluster.org/7283
Reviewed-by: Justin Clift <justin@gluster.org>
Tested-by: Anand Avati <avati@redhat.com>