Let's access exception to diagnose issues

[loganmzz]

Description

After plugin upgrades, I have the following error:

Error Code: -1
Error Message: Invalid input length 849

As error stack is suppressed, I have no way to diagnose the issue. So I modified POJO to let access at least to stack trace.

I run mvn verify to validate my changes.

Submitter checklist

• [ ] Link to JIRA ticket in description, if appropriate.
• [x] Change is code complete and matches issue description.
• [x] Appropriate unit or acceptance tests or explanation to why this change has no tests.
• [x] Reviewer's manual test instructions provided in PR description. See Reviewer's first task below.

Reviewer checklist

• [ ] Run the changes and verified the change matches the issue description.
• [ ] Reviewed the code.
• [ ] Verified that the appropriate tests have been written or valid explanation given.
• [ ] If applicable, tested by installing this plugin on the Jenkins instance.

[nrayapati]

@loganmzz Thank you for logging this PR, probably this is an issue with #120, I will soon take a look at it.

[loganmzz]

ping!