Twitter-oss: Prepare OSS libraries for release

Problem

We want to release the next versions our of Twitter OSS libraries:
 - util -> 6.41.0
 - ostrich -> 9.25.0
 - scrooge -> 4.14.0
 - finagle -> 6.42.0
 - twitter-server -> 1.27.0
 - finatra -> 2.8.0

Solution

Prepare libraries for their next releases.

RB_ID=906879

CHANGES

@@ -7,6 +7,9 @@ Note that ``RB_ID=#`` correspond to associated messages in commits.
 1.x
 -----
 
+1.27.0
+------
+
 New Features
 ~~~~~~~~~~~~
 

project/Build.scala

@@ -9,9 +9,9 @@ object TwitterServer extends Build {
   val branch = Process("git" :: "rev-parse" :: "--abbrev-ref" :: "HEAD" :: Nil).!!.trim
   val suffix = if (branch == "master") "" else "-SNAPSHOT"
 
-  val libVersion = "1.26.0" + suffix
-  val utilVersion = "6.40.0" + suffix
-  val finagleVersion = "6.41.0" + suffix
+  val libVersion = "1.27.0" + suffix
+  val utilVersion = "6.41.0" + suffix
+  val finagleVersion = "6.42.0" + suffix
 
   val jacksonVersion = "2.8.4"
   val jacksonLibs = Seq(