Introduces a REST service endpoint for getting HA information

Introduces an AdvertisableService, MasterInfoService, present conditionally depending on HA mode
Imports from community functional tests all required classes for testing EnterpriseNeoServer
Enables functional tests in server-enterprise
Removes ZK related test code
Functional tests for MasterInfoService
Updates jersey-client for server-enterprise to 1.9
Updates changelog
Whitespace