[JENKINS-74848] Issue in config.xml CannotResolveClassException: com.cloudbees.jenkins.plugins.bitbucket.MergeWithGitSCMExtension

[nfalco79]

Add an alias to fix XStream serialisation

Need to add unit test with an old config.xml with
<com.cloudbees.jenkins.plugins.bitbucket.MergeWithGitSCMExtension plugin="[email protected]">

[nfalco79]

I can not able to create unit test annotated @LocalData because the config.xml provided start with flow-definition. If I put the config.xml that define the <org.jenkinsci.plugins.workflow.multibranch.WorkflowMultiBranchProject plugin="[email protected]_1f45ca_9a_"> and create the filesystem structure

• src/main/resources/package/ClassName/testName/config.xml
• src/main/resources/package/ClassName/testName/branches/PR-744/config.xml

The jenkins rule j.jenkins.getAllItem() an returns empty list.

I proceed with manually test

[nfalco79]

Procedure used for the test:

• Checkout to a commit before remove the deprecated code

git reset --hard 2e79bb32

• Create a multi branch job test with trait "Discover pull requests from origin" configured with "Merging ... target branch" strategy.
• Run a build of PR-744 (the pr I had active)
• Stop jenkins
• Checkout to the commit before this patch

git reset --hard 5b9b36e0

• Run Jenkins
• Check the job configuration -> seems to be, no configuration losts
• In the "Manage Old Data" menù I found
  
• Checkout to this commit

git reset --hard d3cdb5d0

• Run Jenkins again
• Go to the "Manage Old Data" menù
  
  Only repositoryType (expected) was available
• Double check the config.xml of the branch job

<com.cloudbees.jenkins.plugins.bitbucket.MergeWithGitSCMExtension plugin="cloudbees-bitbucket-branch-source@999999-SNAPSHOT">
    <baseName>remotes/origin/master</baseName>
</com.cloudbees.jenkins.plugins.bitbucket.MergeWithGitSCMExtension>