Add the editor unit tests to the editor itself. The editor can now test itself

Add the editor unit tests to the editor itself. The editor can now test itself
when started with the --test command-line flag.
Update the _test plugins to have valid version ranges.
Use the version of hamcrest that the junit plugin depends on.
Add a new junit test runner in the buildbot_test plugin. This checks for a --test flag,
runs all the tests in a job, prints the results to stdout, and exits the editor.
Update the build and test scripts.
Committed: https://code.google.com/p/dart/source/detail?r=19360

[danrubel, 2013-03-01 21:58:15]

lgtm

https://codereview.chromium.org/12377052/diff/2001/editor/tools/features/com....
File
editor/tools/features/com.google.dart.tools.eclipse.platform.feature/feature.xml
(right):

https://codereview.chromium.org/12377052/diff/2001/editor/tools/features/com....
editor/tools/features/com.google.dart.tools.eclipse.platform.feature/feature.xml:903:
id="org.eclipse.team.core"
I don't believe that team is needed for the Dart Editor... just the Dart Plugins

[devoncarew, 2013-03-01 23:02:54]

https://codereview.chromium.org/12377052/diff/2001/editor/tools/features/com....
File
editor/tools/features/com.google.dart.tools.eclipse.platform.feature/feature.xml
(right):

https://codereview.chromium.org/12377052/diff/2001/editor/tools/features/com....
editor/tools/features/com.google.dart.tools.eclipse.platform.feature/feature.xml:903:
id="org.eclipse.team.core"
On 2013/03/01 21:58:15, danrubel wrote:
> I don't believe that team is needed for the Dart Editor... just the Dart
Plugins

OK, removed. We were referencing it form one test plugin, but only for one
non-critical test.

We'll need to revisit the plugins we ship w/ the editor. It looks like we've
added some dependencies to things like the refactorings plugins, which
themselves have dependencies to team and team.ui. We should make sure that our
transitive dependencies are satisfied, or be very certain that not shipping a
referenced plugin will not cause issues. It's been about a year and a half since
we took a careful look at the plugins we ship.

[devoncarew, 2013-03-03 17:54:50]

Committed patchset #2 manually as r19360 (presubmit successful).