fix StepPlayer.cleanUp() to make it close all opened windows
 fix the bug introduced by commit 8d02890 (many release tests were failing for an application, except when they were run one by one)
increase the timeout of assertUntilEquals because some tests were offen failing on a slow machine
During the stepplayer cleanup phase , dispose windows only when they are opened
Merge pull request #19 from codjo-sandbox/integration

StepPlayer.cleanUp() doesn't close all opened dialogs