JENKINS-32394: Fix Changeset number display for Delivery Pipeline

[olivierdagenais]

Slight improvement of #76.

Manual testing

1. Install the Delivery Pipeline Plugin.
2. Create a new job called JENKINS-32394
   1. Check the Delivery Pipeline configuration box and configure as follows:
      1. Stage Name: Development
      2. Task Name: Build
      3. Customize Task Description Template: Build #${BUILD_NUMBER} on ${NODE_NAME}
   2. Select Team Foundation Server under Source Code Management and configure to get source code from a TFVC project.
   3. Add a build step just to see the build doing something. I used Execute Windows batch command set to dir /s
   4. Click [Save]
3. Click Build Now on the new job.
4. Go to the Jenkins home and click the "+" on the top tab row to add a new view and configure as follows:
   1. View name: Pipeline
   2. Select Delivery Pipeline View
   3. Click [OK]
   4. Under View settings, check Show commit messages
   5. Under Pipelines > Components, click [Add] and configure as follows:
      1. Name: Delivery
      2. Initial Job: JENKINS-32394
   6. Click [OK]
5. Notice how there's the first build listed there. Let's go create some changesets in source control and then come back to Jenkins.
6. Click Build Now on the new job a second time.
7. Before the changes from this branch/pull request were applied, the second build would show the "Changes" table with "null" as the changeset ID. After these changes, the "Changes" table now shows the changeset IDs:

Mission accomplished!

[mosabua]

+1

[pskumar448]

@olivierdagenais
Went through the steps and the outcome of this fix, It is as working expected.

[olivierdagenais]

Thank you, @pskumar448 for your contribution and your assistance in verifying the fix!

[pskumar448]

Thanks @olivierdagenais

[thpert]

Thanks a lot :-)