Added graphviz to document step

.gitlab-ci.yml

@@ -49,9 +49,11 @@ document:
   stage: document
   script:
     - echo "Starting Doc Generation..."
+    - apt-get update && apt-get install -y graphviz
     - mvn clean compile
     - mvn $MVN_OPTS generate-resources -Pgenerate-docs
+    - cp target/generated-docs/easydrop.png uml.png
   artifacts:
     paths:
-      - target/generated-docs/easydrop.png
-    name: Easydrop-UML.png
+      - uml.png
+    name: UML