Fix failing tests on Windows

  * brooklyn.util.ResourceUtilsTest.testGetResourceViaClasspathWithoutPrefix() fails on windows paths when OSGi is used
  * Explicitly wait for osgi framework shutdown before deleting the cache folder so all files are unlocked
Fix for test LocationUsageTrackingTest.testUsageIncludesStartAndStopEvents

It is possible to create the event in the same ms as the stopwatch:
java.lang.AssertionError: date=1404984334453; pre=1404984334448; post=1404984334453 expected [true] but found [false]

Just include the start and stop times in the allowed range. Also display the time in ms so the problem is visible.
Fix randomly failing test.

The test was depending on preserving the order of elements in non-preserving
collection implementation (set over the keys of live map). When the instantiated
entities have the same creation time there isn't determinism in picking one of them.
Make the test non-dependant on the insertion order.
Fix occasionally failing temporary file and folder creation.

The previous implementation wasn't deterministic, instead counting
on the statistical improbability of generating an existing file/folder name.
This coupled with the fact that the random generator is weak (repeats
id within 2000 attempts) made it likely to generate an existing name,
leading to unexpected exception.

The solution is to use the Java provided functionality where possible
and retry until success otherwise.
Fix occasionally failing tests - relaying on non-guaranteed time delays.

The code relies on having at least 1ms between the separate test steps
which is non-guaranteed. Include artificial slowdown steps to guarantee
1ms intervals. The concrete problem is that the API doesn't accept
times in the future, while the test wants to check the state 1ms post-event.
changing the tags on an entity should trigger persistence
Address comments in PR #61
  Fix occasionally failing test, check for start and stop times inclusively.
Move catalog YAML test from rest-server to brooklyn-camp.

The test doesn't rely on REST in any way.
Test case to confirm the makeRandomId randomness.
This closes #65
This closes #61
This closes #63
Fix AbstractYamlTest.createAndStartApplication usage
Fix ApiDocResourceTest.testCatalogDetails
This closes #68