Fixing AuthenticationError when running test-webkitpy as a non-committer.
https://bugs.webkit.org/show_bug.cgi?id=106420

Patch by Tim 'mithro' Ansell <mithro@mithis.com> on 2013-01-10
Reviewed by Eric Seidel.

* Scripts/webkitpy/common/checkout/scm/git.py:
(Git.push_local_commits_to_server):
* Scripts/webkitpy/common/checkout/scm/scm_unittest.py:
* Scripts/webkitpy/common/checkout/scm/svn.py:
(SVNRepository):
(SVNRepository.has_authorization_for_realm):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139399 268f45cc-cd09-0410-ab3c-d52691b4dbfc