[ENTESB-2111] Do not call ConnectionStateListener twice (possibly on @deactivated SCR components)
Fix resolution when installing the jaas feature
#2882 container-create-ssh run into "Auth fail" when use password way to auth
Improve the maven proxy:
  - use servlet 3 async mode
  - correctly merge maven metadata
  - use it as a mirror instead of an additional repo
Make sure external repositories are not proxied or mirrored
Update hawtio version
Upgrade to hawtio 1.4.27 & fix some git stuff
Implement new git file manager methods