build/test failure

[sriram]

I checked out the code from the open source git repo. When I tried building
it, I get the error below (failed test) -

org.apache.samza.metrics.TestJmxServer > serverStartsUp FAILED
    java.net.UnknownHostException at TestJmxServer.scala:36
        Caused by: java.net.UnknownHostException at TestJmxServer.scala:36

14 tests completed, 1 failed
:samza-core_2.9.2:test FAILED

FAILURE: Build failed with an exception.