Resource loading seems to be broken with `pants goal run` and `pants goal test`

Hello, it seems that resource loading has broken in a number of cases (somewhere between 9baac01 and HEAD).

This doesn't contain a fix, as I couldn't track it down, but it does include a test case to demonstrate the problem.

For a java library defined as follows:

```
java_library(
  name = 'example_lib',
  dependencies = [
    '3rdparty:guava',
  ],
  sources = rglobs('*.java'),
  resources = ['example.txt'],
)

jvm_binary(
  name = 'example_bin',
  dependencies = [
    pants(':example_lib')
  ],
  main = 'com.foobar.Example'
)
```

Invoking the binary via `pants goal run` fails.

```
$ ./pants goal run src/java/com/foobar:example_bin
...
...
11:58:50 00:01       [run]
                     Exception in thread "main" java.lang.IllegalArgumentException: resource example.txt relative to com.foobar.Example not found.
	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:119)
	at com.google.common.io.Resources.getResource(Resources.java:203)
	at com.foobar.Example.loadResource(Example.java:15)
	at com.foobar.Example.main(Example.java:20)
```

Same with a test that depends on the library:

```
java_tests(
  name = 'example_test',
  dependencies = [
    '3rdparty:junit',
    pants('src/java/com/foobar:example_lib'),
  ],
  sources = globs('*.java')
)
```

```
$ ./pants goal test tests/java/com/foobar:example_test
...
                     .E
                     Time: 0.013
                     There was 1 failure:
                     1) testLoadResources(com.foobar.ExampleTest)
                     java.lang.IllegalArgumentException: resource example.txt relative to com.foobar.Example not found.
                     	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:119)
                     	at com.google.common.io.Resources.getResource(Resources.java:203)
                     	at com.foobar.Example.loadResource(Example.java:15)
                     	at com.foobar.ExampleTest.testLoadResources(ExampleTest.java:10)
                     	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                     	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
                     	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                     	at java.lang.reflect.Method.invoke(Method.java:597)
                     	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
                     	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
                     	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
                     	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
                     	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
                     	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
                     	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
                     	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
                     	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
                     	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
                     	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
                     	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
                     	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
                     	at com.twitter.common.testing.runner.CompositeRequest.runChild(CompositeRequest.java:50)
                     	at com.twitter.common.testing.runner.ConcurrentCompositeRequest$1$1.run(ConcurrentCompositeRequest.java:35)
                     	at com.twitter.common.testing.runner.ConcurrentRunnerScheduler.finished(ConcurrentRunnerScheduler.java:82)
                     	at com.twitter.common.testing.runner.ConcurrentCompositeRequest$1.evaluate(ConcurrentCompositeRequest.java:44)
                     	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
                     	at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
                     	at com.twitter.common.testing.runner.JUnitConsoleRunner.run(JUnitConsoleRunner.java:291)
                     	at com.twitter.common.testing.runner.JUnitConsoleRunner.main(JUnitConsoleRunner.java:488)

                     FAILURES!!!
                     Tests run: 1,  Failures: 1

```

However, building a binary deploy jar works fine.

```
$ ./pants goal binary --binary-deployjar src/java/com/foobar:example_bin
$ java -jar ./dist/example_bin.jar
Resource Content: Hello, World!
...
```

Are we defining our resources in the wrong way or something?  Thanks!