Fix failing tests (from jenkins)

- EntityExecutionManagerTest.testGetTasksAndGcBoringTags
- LocalhostMachineProvisioningLocationTest.obtainTwoAddressesInRangeThenDontObtain
- LocalhostMachineProvisioningLocationTest.obtainPortFailsIfInUse
- ApplicationResourceTest.testDeployApplication
This closes #207
Add location customiser to fix broken sudo/tty behaviour.
This closes #209
Add license header to SudoTtyFixingCustomizer
This closes #215
Log.warn about last build with io.brooklyn maven group id
This closes #216