Small refactoring:
- to check Ssh server extension compatibility.
- to keep old SSh Server/extensions class names
Merge branch 'master' of https://github.com/awltech/org.parallelj

* 'master' of https://github.com/awltech/org.parallelj:
  Small refactoring: - to check Ssh server extension compatibility. - to keep old SSh Server/extensions class names