Adding WebUI Host test cases
    
    Added test cases due to downstream test cases
    - negative input
    - ssh keys
    - csr
    - otp
    - filter
    - buttons
    
    https://pagure.io/freeipa/issue/7550
    
    Signed-off-by: Pavel Picka <ppicka@redhat.com>
    Reviewed-By: Varun Mylaraiah <mvarun@redhat.com>
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>