Merge branch 'update-gitlab-ci-yaml' into 'develop'

.gitlab-ci.yml

src/policy/.gitlab-ci.yml

src/policy/pom.xml

src/policy/src/main/docker/Dockerfile.multistage.jvm

...olicy/src/main/java/eu/teraflow/policy/PolicyGateway.java

...y/src/main/java/eu/teraflow/policy/PolicyGatewayImpl.java

...olicy/src/main/java/eu/teraflow/policy/PolicyService.java

...y/src/main/java/eu/teraflow/policy/PolicyServiceImpl.java

...src/main/java/eu/teraflow/policy/SimpleLivenessCheck.java

.../main/java/eu/teraflow/policy/context/ContextService.java

...main/java/eu/teraflow/policy/context/model/ContextId.java

.../main/java/eu/teraflow/policy/context/model/DeviceId.java

...src/main/java/eu/teraflow/policy/context/model/Event.java

.../java/eu/teraflow/policy/context/model/EventTypeEnum.java

...main/java/eu/teraflow/policy/context/model/ServiceId.java

.../src/main/java/eu/teraflow/policy/context/model/Uuid.java

...cy/src/main/java/eu/teraflow/policy/model/PolicyRule.java

.../main/java/eu/teraflow/policy/model/PolicyRuleAction.java

...in/java/eu/teraflow/policy/model/PolicyRuleCondition.java

...c/main/java/eu/teraflow/policy/model/PolicyRuleEvent.java