Add Mac WK2 EWS bots
https://bugs.webkit.org/show_bug.cgi?id=106590

Reviewed by Adam Barth.

Added MacWK2EWS, and made myself a watcher for MacEWS and MacWK2EWS.
Also add a deprecated MacWK2Port class.

* QueueStatusServer/model/queues.py:
(Queue):
* Scripts/webkitpy/common/config/ports.py:
(DeprecatedPort.port):
(MacWK2Port):
(MacWK2Port.run_webkit_tests_command):
* Scripts/webkitpy/tool/commands/earlywarningsystem.py:
(MacEWS):
(MacWK2EWS):
* Scripts/webkitpy/tool/commands/earlywarningsystem_unittest.py:
(_test_ewses):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139357 268f45cc-cd09-0410-ab3c-d52691b4dbfc