* Re enabling Java tests in akka-docs (they were not run before)
* Fixed bug #19764
* #19735 Rewrote every sample using the deprecated PushPullStage and friends
using GraphStage
* Pruned old unused graph images
* Added missing graffle file for new graph images
* and don't show AkkaSpec in doc code
(cherry picked from commit 23be60395cdea846ef168960cd05e88c6bd29556)
Conflicts:
akka-docs/rst/scala/code/docs/actor/FaultHandlingDocSpec.scala
akka-docs/rst/scala/fault-tolerance.rst