upgrade scala, fix compile (#4859)

frameworks/Scala/fintrospect/build.sbt

@@ -2,7 +2,7 @@ name := """techempower-benchmarks-fintrospect"""
 
 version := "1.0"
 
-scalaVersion := "2.12.5"
+scalaVersion := "2.12.8"
 
 scalacOptions += "-deprecation"
 

frameworks/Scala/fintrospect/src/main/scala/FintrospectBenchmarkServer.scala

@@ -2,15 +2,11 @@ import java.util.TimeZone.getTimeZone
 
 import com.twitter.finagle.http.path.Root
 import com.twitter.finagle.http.{Request, Response}
-import com.twitter.finagle.stack.nilStack
 import com.twitter.finagle.{Filter, Http}
 import com.twitter.util.Await
 import io.fintrospect.RouteModule
-import io.fintrospect.configuration.Host
 import io.fintrospect.filters.ResponseFilters
-import org.apache.commons.lang.time.FastDateFormat.getInstance
-
-import scala.util.Properties
+import org.apache.commons.lang3.time.FastDateFormat.getInstance
 
 object FintrospectBenchmarkServer extends App {
 
@@ -35,7 +31,6 @@ object FintrospectBenchmarkServer extends App {
   Await.ready(
     Http.server
       .withCompressionLevel(0)
-      .withStack(nilStack)
       .serve(":9000", ResponseFilters.CatchAll().andThen(addServerAndDate).andThen(module.toService))
   )
 }