Upgrade to use jcasc test harness

[timja]

JCasc had to create a new dependency that wasn't a tests classifier because maven doesn't allow you to bring dependencies through classifiers.

Upgrading here so that PCT works again,

Tracking:
jenkinsci/bom#164

Note: We'll need a release for PCT please

[daniel-beck]

@timja Could you PTAL at JENKINS-60799 and see why the user claims he only gets 1.32? I'd rather not break even more Docker images with this change.

[timja]

JENKINS-60799

I don't understand that issue, install-plugins should install transitive dependencies automatically.

The issue that I could see happening would be users that have pinned configuration-as-code to an old version but updated a plugin that requires a newer version, and the error should be pretty obvious.

Also the issue has no error message to give context, so can't give more information than this really.