add_new_user.sh: fix error putting users in sudoer group.

add_new_user.sh

@@ -402,9 +402,9 @@ chown -R ${user_name}:${user_name} ${home_dir}/.ssh
 
 # Add authorized users to the sudoers group 
 #
-for __user in ${sudo_users_arr[@]} ; do
-   usermod -a -G sudo ${__user}
-done
+if containsElement "${user_name}" "${sudo_users_arr[@]}" ; then
+   usermod -a -G sudo ${user_name}
+fi
 
 #ls -al ${home_dir}/.ssh
 echo ""