Refactor Execution workflow and actor behaviour
Merge branch 'future/0.1.0' of github.com:Stratio/stratio-meta into future/0.1.0

Conflicts:
	meta-common/src/main/scala/com/stratio/meta/communication/messages.scala
Update Management workflow and coordinator
Merge branch 'future/0.1.0' of github.com:Stratio/stratio-meta into future/0.1.0