Accumulo unit tests fail with Accumulo 1.6.1 because of conflicts in libthrift libraries

Accumulo 1.6.1 has started the use of thrift 0.9.1 version and uses 0.9.1 specific methods in the tablet server.

But Hive is still using 0.9.0 version and this causes the miniAccumuloCluster to pick up the 0.9.0 jar file. The tests time out because the tablet servers fail when invoking a thrift 0.9.1 method.