Jenkins : Proposed Plugin Deprecation

With so many plugins being written, more and more overlap/duplication of functionality is showing up. In order to clean up the list of plugins and make life easier for users, we should review plugins and when appropriate, deprecate those which have been superseded by newer ones. Deprecated plugins would be removed from the Update Center's available plugin list going forward. Note that some of these deprecations may already have been made, but without the Update Center change.

Actions taken:

Below is a list of possible deprecations: