Initial support for concurrency in databoard, bindings and serializers

Initial support for concurrency in databoard, bindings and serializers

* This fixes the parallellization problem in PlatformUtil.getAllGraphs
where parallel streams can now be used.
* VariableBinding is removed because it hasn't ever been used and it is
deadlock prone and not very useful
* Removed SerialisationSupport field from ResourceBinding as it has been
commented out for ages now. If we need this at some point, let's add it
back.

gitlab #180

Change-Id: Ic4240921b5e60ea8d642feb85e9608f936272190