If `createRandomScore()` happened to randomly pick the highest total
score when called with `friend` as the sole argument, that particular
score would not be pink.
`GetScoreByUsername()` would arbitrarily pick the first score for the
user, so in this particular case where a friend had the number 1 score,
the test would wrongly fail.
Fix by checking whether any of the 3 added friend scores have received
the pink colour. Because there is more than 1 friend score in the test,
doing so ensures that at least one of those should eventually become
pink (because, obviously, you can't have two scores at number 1).
Allows to clearly see what the failure is:
TearDown : System.TimeoutException : "friend score is pink" timed out: Expected: some item equal to "#FF549A"
But was: < "#FFFFFF", "#7FCC33", "#444444" >
The #7FCC33 colour is used for the first score on the leaderboard.
