Re-factored all existed CLI code to follow the new proposed scheme for
raising an exception if issue occurs, handling and reporting it.
Unified CLIRegisterer as well.
Fixed unit tests to follow the new scheme.

Just import changes, from hudson.model.Jenkins -> jenkins.model.Jenkins,
and Javadoc comments.
Signed-off-by: NNigel Magnay <nigel.magnay@gmail.com>

Signed-off-by: NNigel Magnay <nigel.magnay@gmail.com>

Current CLI is always available and most commands can be run by anonymous users.
Now only a short help message and the login command are available for anonymous
in a Hudson without anonymous read permission, and each individual command also
checks the appropriate permission for that command.  Details:
* Vulnerable CLI commands now fixed:
  build, clear-queue, copy-job, create-job, delete-builds, delete-job,
  disable-job, enable-job, install-plugin, install-tool, keep-build,
  mail, restart, safe-restart, set-build-result
* Broken CLI commands now fixed:
  connect-node, delete-node, disconnect-node, offline-node, online-node
* Other vulnerable command (not CLI) now fixed: /gc (JVM garbage collect)


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@33626 71c3de6d-444a-0410-be80-ed276b4c234a

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@28934 71c3de6d-444a-0410-be80-ed276b4c234a

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@19113 71c3de6d-444a-0410-be80-ed276b4c234a

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@17606 71c3de6d-444a-0410-be80-ed276b4c234a