Migrate finagle-thrift/finagle-stream tests to ScalaTest

In preparation for 2.11.x finagle-thrift tests will migrate to ScalaTest


Remaining Work:
1) Finagle-Streams
2) 2.11.x testing
3) Conversation about FinagleClientThriftServerSpec structure
4) Renaming tests from *Spec -> *Test
5) Clean up commit history and conform to commit message standards
Let me see if I can make a function that combines test/ignore and observes SKIP_FLAKY.  This should be possible