No validation done when user resets a password

[kiranchavala]

The required feature described as a wish

Steps to reproduce the issue

1. Enable the global setting "user.password.reset.enabled"

2. Click on forgot password option from the UI

3. User provides the same password, Cloudstack doesn't validate the password and sets the same password for the user

Expected behaviour

Cloudstack should validate if the same password is used for reset password, this can prevent security related issues