Feature Max Artifact Storage quota (#739)

* Enforcement of artifact storage quota
* Added REST integration tests for artifact upload
* Fix test config
* Fix failing test cases
* Fix PR review findings

Signed-off-by: Stefan Behl <stefan.behl@bosch-si.com>

hawkbit-repository/hawkbit-repository-core/src/main/java/org/eclipse/hawkbit/repository/PropertiesQuotaManagement.java

@@ -98,4 +98,9 @@ public class PropertiesQuotaManagement implements QuotaManagement {
         return securityProperties.getDos().getMaxArtifactSize();
     }
 
+    @Override
+    public long getMaxArtifactStorage() {
+        return securityProperties.getDos().getMaxArtifactStorage();
+    }
+
 }