adding prod branch #6194
[Users]: 1. Update Uikit. 2. Change regisered service api. 3. fix empty registered service list.
Fix javascript messages and Add some more checks for the input values at ResetPassword, AddPassword, Verify and Activate. Add InputValidator.Java
Added recaptcha
Change username regulars expression - Allow usernames that start with character or digit, Change error messages
Fix typo in email regex
Add check for username - Allow only numbers, letters, periods, underscores and hyphens
Add uikit-icons.min.js library
Add uikit-icons-max.js
Remove javascript for oganization field anf add message error for activation code
Add password error check
Basic servlet status for username reminder and password reset