weather: settle before snapshotting in aaa_setup
    
    We've seen some failures of the weather test at the start of
    weather_report, where the test expects to be at the hourly view,
    and instead it seems to be at a sort of broken state:
    https://openqa.fedoraproject.org/tests/1505080#step/weather_report/3
    I'm guessing this may be because currently aaa_setup clicks the
    city name then is immediately complete, so it will immediately
    snapshot. I guess this can result in things being stuck in a kind
    of intermediate state on snapshot restore. So, to try and avoid
    this, let's assert that we reach the hourly view after clicking
    the city name, then wait_still_screen for a few seconds to make
    sure things are settled down, before we complete and snapshot.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>