server: improve comment for backport

This PR adds some extra info specifying what issues were created and for what
branches during a backport. This makes it easier for users to track what is
going on without having to follow many links in the Jira UI.

cmd/jira-lifecycle-plugin/server.go

@@ -2029,6 +2029,7 @@ func handleBackport(e event, gc githubClient, jc jiraclient.Client, repoOptions
 	if len(branchesMissingDependents) != 0 {
 		return comment(fmt.Sprintf("Missing required branches for backport chain: %v", missingDependencies.UnsortedList()))
 	}
+	createdIssuesMessageLines := []string{}
 	for _, refIssue := range e.issues {
 		if !refIssue.IsBug {
 			continue
@@ -2049,6 +2050,7 @@ func handleBackport(e event, gc githubClient, jc jiraclient.Client, repoOptions
 		var newLabels []string
 		for key, branch := range createdIssues {
 			newLabels = append(newLabels, fmt.Sprintf("jlp-%s:%s", branch, key))
+			createdIssuesMessageLines = append(createdIssuesMessageLines, insertLinksIntoLine(fmt.Sprintf("- %s for branch %s", key, branch), []string{key}, jc.JiraURL()))
 		}
 		// sorting the labels isn't necessary for production but helps with tests
 		sort.Strings(newLabels)
@@ -2058,7 +2060,10 @@ func handleBackport(e event, gc githubClient, jc jiraclient.Client, repoOptions
 			return comment(fmt.Sprintf("Failed to add label to issue %s: %v", issue.Key, err))
 		}
 	}
-	return comment(fmt.Sprintf("All backport jira issues created. Queuing cherrypicks to the requested branches to be created after this PR merges:\n%s", cherrypickBranches))
+	// make message deterministic for tests
+	sort.Strings(createdIssuesMessageLines)
+	createdIssuesMessage := strings.Join(createdIssuesMessageLines, "\n")
+	return comment(fmt.Sprintf("The following backport issues have been created:\n%s\n\nQueuing cherrypicks to the requested branches to be created after this PR merges:%s", createdIssuesMessage, cherrypickBranches))
 }
 
 // createLinkedJiras recursively creates all descendants of the provided parent issue based on the child branches map

cmd/jira-lifecycle-plugin/server_test.go

@@ -2988,8 +2988,13 @@ Instructions for interacting with me using PR comments are available [here](http
 				"v4": {TargetVersion: &v4Str, DependentBugTargetVersions: &[]string{v5Str}},
 				"v5": {TargetVersion: &v5Str, DependentBugTargetVersions: nil},
 			},
-			expectedComment: `org/repo#1:@user: All backport jira issues created. Queuing cherrypicks to the requested branches to be created after this PR merges:
+			expectedComment: `org/repo#1:@user: The following backport issues have been created:
+- [OCPBUGS-124](https://my-jira.com/browse/OCPBUGS-124) for branch v4
+- [OCPBUGS-125](https://my-jira.com/browse/OCPBUGS-125) for branch v3
+- [OCPBUGS-126](https://my-jira.com/browse/OCPBUGS-126) for branch v2
+- [OCPBUGS-127](https://my-jira.com/browse/OCPBUGS-127) for branch v1
 
+Queuing cherrypicks to the requested branches to be created after this PR merges:
 /cherrypick v1
 /cherrypick v2
 /cherrypick v3