fix issue 55 in JIRA:
InetSocketAddress may resolve "localhost" to network address like "192.168.*.*".
Test failed in TachyonFSTest.toStringTest:421 expected:<...achyon://localhost/1[92.168.172.43]:19998> but was:<...achyon://localhost/1[27.0.0.1]:19998>
Merge pull request #348 from jinntrance/iss55

fix issue 55 in JIRA: