bump finagle and util to 6.22.0
Minified kill 2.9.3
Merge pull request #249 from twitter/removeScala2.9.3-2

Minified kill 2.9.3
Merge branch 'sh_develop' into bump_finagle_save_txns
Merge pull request #247 from dschobel/bump_finagle_6_22_0

bump finagle and util to 6.22.0