TRUNK-4294  [Add User] Password description added 

Password description message code added just after the text field [see screenshot] - webapp/src/main/webapp/WEB-INF/view/admin/users/userForm.jsp -- 

Description Message added - webapp/src/main/webapp/WEB-INF/messages.properties

Ignore change in web/src/main/java/org/openmrs/web/WebUtil.java

![screenshot 9](https://f.cloud.github.com/assets/1978014/2337557/0bd5fe6a-a49f-11e3-8e8b-3ab6cf729bfe.png)