[Stapler Framework Support for IntelliJ] StackOverflow fix testing

[Denys Digtiar]

If you've been using the Stapler Framework Support IntelliJ plugin to edit Jelly files, you might have noticed the StackOverflowError in the JetBrains error reporter. The bug is tracked in https://github.com/jenkinsci/idea-stapler-plugin/issues/66

I tried to fix it. It is a somewhat significant change. Given the dearth of automated tests, I wonder if any brave souls are willing to test the PR. See https://github.com/jenkinsci/idea-stapler-plugin/pull/99 on how to build and install it. I am interested if you can detect any regressions. Or find any Jelly files that still cause StackOverflowError.

[Denys Digtiar]

Nine days so far without comment. I'll wait for another 5 and merge as is.

[Denys Digtiar]

OK. I merged and sent the new release to JetBrains for review.