(Mingle#1849 Gurpreet): Added check for ensuring that during User add, if passwords dont match then error message should be shown. Also did the same for nil userid during password reset.
Merge pull request #580 from gsluthra/Mingle_1849_Fix_Error_Messages_For_UserName_Password

(Mingle#1849 Gurpreet): Added proper error messages for password confirmation and blank userid