Fix REST tests to work under maven

After moving to maven, tests that instantiate FlumeMaster and FlumeNode and expect to be able to find the Jersey REST services fail because the servlets are now in different modules and require assembly to function. We will need to refactor the tests slightly and probably move them out into an integration test module where we can assemble components and then perform tests.

Need to confirm with various maven-istas that this is the best way to go about this.