Typo in add-user help text

There is a typo in help message of add-user tool.

Version-Release number of selected component (if applicable):
EAP 6.4.0.DR1.1

How reproducible:
Always

Steps to Reproduce:
1. ./add-user.sh --help

Actual results:
...
-sc <value> Define the location the server config
directory.
...

Expected results:
...
-sc <value> Define the location of the server config
directory.
...