remote com.twitter.scalatest dependency, so that all dependencies are in Maven Central
refactoring tests
remote org.scalatest dependency too
remove dependencies: org.scalatest and com.twitter.scalatest
refactoring tests
upgrade to util/finagle/ostrich 6.1.0
Merge branch 'master' of https://github.com/chunyan/scrooge into csl376
bump version to Scrooge 3.0.6.