correction of dependencies errors by delecting Akka repo
Refactoring of the project and bug corrections
Merge branch 'master' of https://github.com/awltech/karajan.git

Conflicts:
	karajan-parent/karajan-core/src/main/java/com/wordline/awltech/karajan/orchestrator/masterslavepullpattern/StepExecutionManager.java
	karajan-parent/karajan-core/src/main/test/com/wordline/awltech/karajan/orchestrator/masterslavepullpatterntest/OrchestratorTest.java
Implementation of the Supervisor Strategy