WebUI tests: Extend user group tests with more scenarios
    
    1) Extended webui group automation test with below scenarios
    	Scenarios
    	 *Add user group with invalid names
    	 *Add multiple groups records at one shot
    	 *Select and delete multiple records
    	 *Find and delete records etc...
    2) Improved add_record method to support additional use cases:
    	 *confirm by additional buttons: 'Add', 'Add and add another', 'Add and Edit,' 'Cancel'
    	 *add multiple records in one call (uses 'Add and add another' behavior)
    
    https://pagure.io/freeipa/issue/7485
    
    Signed-off-by: Varun Mylaraiah <mvarun@redhat.com>
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>
    Reviewed-By: Michal Reznik <mreznik@redhat.com>