Fix modeshape-connector-cmis test failure

I'm seeing a test failure in the modeshape-connector-cmis integration tests. It seems like the CMIS source is not fully initialized by the time the tests run in my environment.

The tests did pass after I added a Thread.sleep(5000) below this line:

    
    @BeforeClass
    public static void beforeAll() throws Exception {
        RepositoryConfiguration config = RepositoryConfiguration.read("config/repository-1.json");
        startRepository(config);
    }

https://github.com/ModeShape/modeshape/blob/master/connectors/modeshape-connector-cmis/src/test/java/org/modeshape/connector/cmis/CmisConnectorIT.java#L70

Is there something I should do instead, e.g. to poll for a ready state?