Use junit-runner-1.0.10

Bumps our junit-runner dep to 1.0.10.
Incorporates changes for recognizing failed assumptions a skipped tests from  https://rbcommons.com/s/twitter/r/4010/

Testing Done:
CI green at https://travis-ci.org/pantsbuild/pants/builds/139777775

Bugs closed: 3596

Reviewed at https://rbcommons.com/s/twitter/r/4020/

src/python/pants/backend/jvm/tasks/junit_run.py

@@ -115,7 +115,7 @@ def register_options(cls, register):
     cls.register_jvm_tool(register,
                           'junit',
                           classpath=[
-                            JarDependency(org='org.pantsbuild', name='junit-runner', rev='1.0.9'),
+                            JarDependency(org='org.pantsbuild', name='junit-runner', rev='1.0.10'),
                           ],
                           main=JUnitRun._MAIN,
                           # TODO(John Sirois): Investigate how much less we can get away with.