scm: mercurial: fix extension cmdtable on Mercurial 1.5 (#9465)

scm: mercurial: fix extension cmdtable on Mercurial 1.5 (#9465)

Before Mercurial revision "40c06bbf58be":http://www.selenic.com/repo/hg-stable/rev/40c06bbf58be ,
following error raises.

<pre>
Traceback (most recent call last):
  File "/WEB-DOWN/hg-repo/hg-crew/hg", line 27, in <module>
    mercurial.dispatch.run()
  File "/WEB-DOWN/hg-repo/hg-crew/mercurial/dispatch.py", line 16, in run
    sys.exit(dispatch(sys.argv[1:]))
  File "/WEB-DOWN/hg-repo/hg-crew/mercurial/dispatch.py", line 30, in dispatch
    return _runcatch(u, args)
  File "/WEB-DOWN/hg-repo/hg-crew/mercurial/dispatch.py", line 47, in _runcatch
    return _dispatch(ui, args)
  File "/WEB-DOWN/hg-repo/hg-crew/mercurial/dispatch.py", line 398, in _dispatch
    cmd, func, args, options, cmdoptions = _parse(lui, args)
  File "/WEB-DOWN/hg-repo/hg-crew/mercurial/dispatch.py", line 277, in _parse
    args = fancyopts.fancyopts(args, c, cmdoptions, True)
  File "/WEB-DOWN/hg-repo/hg-crew/mercurial/fancyopts.py", line 62, in fancyopts
    for short, name, default, comment in options:
ValueError: too many values to unpack

  1) Error:
test_nodes_in_branch(MercurialAdapterTest):
Redmine::Scm::Adapters::MercurialAdapter::HgCommandAborted: hg exited with non-zero status: 1
    lib/redmine/scm/adapters/mercurial_adapter.rb:306:in `hg'
    lib/redmine/scm/adapters/mercurial_adapter.rb:234:in `nodes_in_branch'
    test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb:311:in `test_nodes_in_branch'
    test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb:304:in `each'
    test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb:304:in `test_nodes_in_branch'
</pre>

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7640 e93f8b46-1217-0410-a6f0-8f06a7374b81