OPENNLP-936: Add thread-safe versions of POSTaggerME, SentenceDetecto…

[twgoetz]

…rME and TokenizerME. Include test case as well.

I'm open to changing the names of the classes, if anybody has a better idea.

[kottmann]

Thanks!

• Indent by 2 spaces (not 4), checkstyle is giving many warnings about that (click the green check mark to see the travis-ci output)
• Each new file needs to have AL 2.0 license header
• Commit messages subject line is limited to 72 chars, please make it short and also use the body of it
• We strongly recommend to set up Eclipse or Intellij with the style files from our code convention page (https://opennlp.apache.org/code-conventions.html)
• Update the commit above e.g. via git commit --amend or squash and then force push (git push -f) to update the PR

[twgoetz]

Ok done.

[mawiesne]

This issue (OPENNLP-936) is still relevant to many users. Is there any form of consensus - in 2022 - on how to progress with the current code base?

[jzonthemtn]

The comments on this PR seem fairly trivial. I have no objections to getting those comments addressed and merging this. I will go through the PR again and see if there's anything since then that should be addressed.

Thanks @mawiesne for bringing attention to this one.