pytest/sudo: Add 2 fixtures set_entry_cache_sudo_timeout and generic_sudorule
    
    set_entry_cache_sudo_timeout: this fixture adds entry_cache_sudo_timeout
    to domain sections of sssd.conf
    generic_sudorule: This is a generic sudo rule addding command /usr/bin/less
    to be executed by posix user
    
    generic_sudorule: Adds a generic sudo rule to access /usr/bin/less
    
    Signed-off-by: Niranjan M.R <mrniranjan@redhat.com>
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>