master.cfg cleanup, pass BuildStep instances instead of BuildStep subclasses

cfg cleanup, pass BuildStep instances instead of BuildStep subclasses
https://bugs.webkit.org/show_bug.cgi?id=89001

Patch by Szilard Ledan <szledan@inf.u-szeged.hu> on 2012-07-03
Reviewed by Csaba Osztrogonác.

* BuildSlaveSupport/build.webkit.org-config/master.cfg:
(UploadBuiltProduct.__init__):
(UploadTestResults.__init__):
(ExtractTestResults.__init__):
(Factory.__init__):
(BuildFactory.__init__):
(TestFactory.__init__):
(BuildAndTestFactory.__init__):
(BuildAndPerfTestFactory.__init__):
(BuildAndPerfTestWebKit2Factory.__init__):
(DownloadAndPerfTestFactory.__init__):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121760 268f45cc-cd09-0410-ab3c-d52691b4dbfc