Closes #106
Fix GeoDNS tests
The GEODNS tests are currently failing:
```
2017-05-10 03:59:21,695 ERROR Problem refreshing group membership: org.apache.brooklyn.util.exceptions.RuntimeInterruptedException: java.lang.InterruptedException
org.apache.brooklyn.util.exceptions.RuntimeInterruptedException: java.lang.InterruptedException
at org.apache.brooklyn.util.exceptions.Exceptions.propagate(Exceptions.java:124) ~[brooklyn-utils-common-0.12.0-SNAPSHOT.jar:0.12.0-SNAPSHOT]
Caused by: java.lang.InterruptedException: null
at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:404) [na:1.8.0_121]
Tests run: 42, Failures: 1, Errors: 0, Skipped: 22, Time elapsed: 57.834 sec <<< FAILURE! - in TestSuite
tearDown(org.apache.brooklyn.entity.dns.AbstractGeoDnsServiceTest) Time elapsed: 31.464 sec <<< FAILURE!
org.testng.internal.thread.ThreadTimeoutException: Method org.apache.brooklyn.core.test.BrooklynMgmtUnitTestSupport.tearDown() didn't finish within the time-out 30000
Results :
Failed tests:
AbstractGeoDnsServiceTest>BrooklynMgmtUnitTestSupport.tearDown:58->BrooklynMgmtUnitTestSupport.destroyManagementContextSafely:71 ยป ThreadTimeout
```
This swaps them to integration tests.
