Unreviewed.  Move OutputCapture to webkitpy.common.system.
        https://bugs.webkit.org/show_bug.cgi?id=36093

        * Scripts/webkitpy/common/net/bugzilla_unittest.py:
        * Scripts/webkitpy/common/net/credentials_unittest.py:
        * Scripts/webkitpy/common/system/outputcapture.py: Copied from Scripts/webkitpy/outputcapture.py.
        * Scripts/webkitpy/outputcapture.py: Removed.
        * Scripts/webkitpy/tool/commands/commandtest.py:
        * Scripts/webkitpy/tool/commands/queues_unittest.py:
        * Scripts/webkitpy/tool/commands/queuestest.py:
        * Scripts/webkitpy/tool/multicommandtool_unittest.py:
        * Scripts/webkitpy/tool/steps/closebugforlanddiff_unittest.py:
        * Scripts/webkitpy/tool/steps/steps_unittest.py:
        * Scripts/webkitpy/tool/steps/updatechangelogswithreview_unittests.py:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@56519 268f45cc-cd09-0410-ab3c-d52691b4dbfc