[Add User] Password requirements should be shown beforehand as per the global properties

Tested at... http://uat01.openmrs.org:8080/openmrs

Password requirements are now displayed beside the password box: Password should be 8 characters long and should have both upper and lower case characters , at least one digit , at least one non digit

Note 1: there are spaces before the commas, which is not considered proper grammar. This should be fixed.
Note 2: if the username and password are the same when security.passwordCannotMatchUsername=true, the error message is: Please choose a stronger password
Note 3: There is no mention in the password requirement for it to not be the same as the username (if the global property is set for that).
Note 4: If only two global property requirements are true, they should be joined with "and" rather than a comma (,), or they could use commas everywhere. It is currently shown: Password should be 6 characters long and should have at least one digit , at least one non digit

Merged at: https://github.com/openmrs/openmrs-core/commit/f338537806efe0540a42920e8a3fe4e3618700fb

Merged! Thanks!

Already made the pull request. forgot to press 'code review'
Please review it - https://github.com/openmrs/openmrs-core/pull/769

Ujjwal are you sting working on this?