removing -s option from gswauth tools

the --suffix option is not currently supported in this version
of gswauth, so we are removing to not confuse users.

Bug 1262230: https://bugs.launchpad.net/gluster-swift/+bug/1262230

Change-Id: I12da2aad5929f619f838c217330bef503b7e0ba2
Signed-off-by: Thiago da Silva <thiago@redhat.com>
Reviewed-on: http://review.gluster.org/6542
Reviewed-by: pushpesh sharma <psharma@redhat.com>
Tested-by: pushpesh sharma <psharma@redhat.com>
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Tested-by: Prashanth Pai <ppai@redhat.com>
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Fixes,TCs for user/account operation by non super_admin users

This commit does following:
1.New functions in Utils based on CLI
2.Fixes for existing suite
3.Test cases for non super_admin users doing user/account operations

I tried to cover most of the possible test cases that can be duducted
from the swauth dev guide and swuath user role matrix.These resources
can be found here:
https://raw.github.com/rbeede/swauth/master/doc/source/Draft%20Security%20Guide/swift_swauth_roles_matrix.png
http://gholt.github.io/swauth/dev/

Change-Id: I3267a718e5432cddc751ec53fe9b05ef9061a5e3
Signed-off-by: Pushpesh Sharma <psharma@redhat.com>
Reviewed-on: http://review.gluster.org/6537
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>