APPController for ADAPT VH

...java/eu/DECIDEh2020/appManager/models/ScalabilityNfr.java

.../java/eu/DECIDEh2020/appManager/models/SchemaElement.java

...va/eu/DECIDEh2020/appManager/models/ServiceObjective.java

...r/src/main/java/eu/DECIDEh2020/appManager/models/Sla.java

...u/DECIDEh2020/appManager/models/ViolationTriggerRule.java

...java/eu/DECIDEh2020/appManager/models/VirtualMachine.java

...ava/eu/DECIDEh2020/appManager/persistence/GitHandler.java

...er/src/main/resources/application_description.schema.json

.../eu/DECIDEh2020/appManager/AppDescriptionFactoryTest.java

AppController/src/test/resources/DECIDE.json