Merge pull request #3137 from edx/e0d/doc-clarification

Small config clarification

playbooks/edx-east/manage_edxapp_users_and_groups.yml

@@ -6,7 +6,7 @@
 # code style: https://openedx.atlassian.net/wiki/display/OpenOPS/Ansible+Code+Conventions
 # license:    https://github.com/edx/configuration/blob/master/LICENSE.TXT
 #
-# Usage: ansible-playbook -i lms-host-1, -e@path/to/configfile
+# Usage: ansible-playbook -i lms-host-1, -e@/path/to/group/configfile -e@/path/to/user/configfile
 #
 # Overview:
 # This playbook ensures that the specified users and groups exist in the targeted