Add Admin task for UAT to kick off cleanup of models

- Fixes #163

features/api/cleanup.feature

@@ -0,0 +1,16 @@
+Feature: DeployDB cleanup APIs
+
+  As a DeployDB administrator
+  I should be able to cleanup the artifact, deployment promotion results models
+
+
+  @dbd
+  Scenario: The model cleanup shall be successful
+    Given there is a deployment
+    When I POST to "/tasks/modelCleanup?group=com.example.cucumber&name=cucumber-artifact&version=1.0.1" from the admin app
+    Then the response should be 200
+    And the response body should be:
+    """
+    Done!
+    """
+    And the artifact doesn't exist

src/main/groovy/deploydb/ModelCleanupTask.groovy

@@ -0,0 +1,45 @@
+package deploydb
+
+import com.codahale.metrics.annotation.Timed
+import com.google.common.collect.ImmutableMultimap
+import io.dropwizard.servlets.tasks.Task
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+
+/**
+ * Admin task to Cleanup models in the deploydb
+ */
+class ModelCleanupTask extends Task {
+    private WorkFlow workFlow
+    private static final Logger logger = LoggerFactory.getLogger(ConfigReloadTask.class)
+
+    /**
+     * Constructor
+     *
+     * @param workFlow - store the workFlow for executing load config
+     */
+    ModelCleanupTask(WorkFlow workFlow) {
+        super('modelCleanup')
+        this.workFlow = workFlow
+    }
+
+    @Timed
+    @Override
+    void execute(ImmutableMultimap<String, String> parameters, PrintWriter output) throws Exception {
+
+        String group = String.valueOf(parameters.get("group").toArray()[0])
+        String name = String.valueOf(parameters.get("name").toArray()[0])
+        String version = String.valueOf(parameters.get("version").toArray()[0])
+
+        this.workFlow.deployDBApp.withHibernateSession() {
+            try {
+                this.workFlow.flowDAO.deleteFlowByArtifactNameGroupVersion(group, name, version)
+                output.println("Done!")
+            } catch (Exception e) {
+                logger.error("Cleanup of the model failed with an exception: ", e)
+                output.println("Failed: " + e.getMessage())
+                throw e
+            }
+        }
+    }
+}