NIFI-14570 Retain Git Registry Client Metadata Timestamp in JSON

- Updated Git Flow Registry Client to remove setting the timestamp field to 0

Author: exceptionfactory

nifi-extension-bundles/nifi-extension-utils/nifi-git-flow-registry/src/main/java/org/apache/nifi/registry/flow/git/AbstractGitFlowRegistryClient.java

@@ -355,7 +355,6 @@ public RegisteredFlowSnapshot registerFlowSnapshot(final FlowRegistryClientConfi
         flowSnapshot.getSnapshotMetadata().setBranch(null);
         flowSnapshot.getSnapshotMetadata().setVersion(null);
         flowSnapshot.getSnapshotMetadata().setComments(null);
-        flowSnapshot.getSnapshotMetadata().setTimestamp(0);
 
         // remove all parameter values if configured to do so
         final ParameterContextValuesStrategy parameterContextValuesStrategy = context.getProperty(PARAMETER_CONTEXT_VALUES).asAllowableValue(ParameterContextValuesStrategy.class);

nifi-extension-bundles/nifi-github-bundle/nifi-github-extensions/src/test/java/org/apache/nifi/github/GitHubFlowRegistryClientTest.java

@@ -116,11 +116,13 @@ public void testRegisterFlowSnapshot() throws IOException, FlowRegistryException
 
         final RegisteredFlow incomingFlow = createIncomingRegisteredFlow();
 
+        final long timestamp = System.currentTimeMillis();
         final RegisteredFlowSnapshotMetadata incomingMetadata = new RegisteredFlowSnapshotMetadata();
         incomingMetadata.setBranch(incomingFlow.getBranch());
         incomingMetadata.setBucketIdentifier(incomingFlow.getBucketIdentifier());
         incomingMetadata.setFlowIdentifier(incomingFlow.getIdentifier());
         incomingMetadata.setComments("Unit test");
+        incomingMetadata.setTimestamp(timestamp);
 
         final RegisteredFlowSnapshot incomingSnapshot = new RegisteredFlowSnapshot();
         incomingSnapshot.setFlow(incomingFlow);
@@ -154,6 +156,7 @@ public void testRegisterFlowSnapshot() throws IOException, FlowRegistryException
         assertEquals(incomingMetadata.getBucketIdentifier(), resultMetadata.getBucketIdentifier());
         assertEquals(incomingMetadata.getFlowIdentifier(), resultMetadata.getFlowIdentifier());
         assertEquals(incomingMetadata.getComments(), resultMetadata.getComments());
+        assertEquals(timestamp, resultMetadata.getTimestamp());
 
         final FlowRegistryBucket resultBucket = resultSnapshot.getBucket();
         assertNotNull(resultBucket);