[2.8] Fix play-scala-tls-example on Java 11 (#19)

[2.8] Fix play-scala-tls-example on Java 11

.travis.yml

@@ -68,12 +68,6 @@ env:
     - SCRIPT="cd play-scala-tls-example            && scripts/test-sbt" TRAVIS_JDK=adopt@1.11.0-2
     - SCRIPT="cd play-scala-websocket-example      && scripts/test-sbt" TRAVIS_JDK=adopt@1.11.0-2
 
-matrix:
-  fast_finish: true
-  allow_failures:
-    # Java 11 is not fully supported, look at and resolve these issues
-    - env: SCRIPT="cd play-scala-tls-example            && scripts/test-sbt" TRAVIS_JDK=adopt@1.11.0-2
-
 before_install:
   - sudo add-apt-repository -y ppa:ondrej/php && sudo apt-get -qq update && sudo apt-get install -y libsodium-dev # for secure session examples
   - curl -Ls https://git.io/jabba | bash && . ~/.jabba/jabba.sh

play-scala-tls-example/conf/ws.conf

@@ -1,9 +1,5 @@
 play.ws.ssl {
 
-  debug = {
-    handshake = true
-  }
-
   keyManager = {
     stores = [
       // Note: must be run from ./play, which loads the KEY_PASSWORD environment variable.

play-scala-tls-example/project/plugins.sbt

@@ -1,3 +1,2 @@
 // The Play plugin
-addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.2")
-
+addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.8.0-M1")