Jenkins build server: block all IPs from accessing dev server machines

After we notify users of Ops Server cutoff, there are still users access various servers. The build process does disconnect users that have open sessions to files and folders, but users could re-estable the session and cause problems for the build process.

We need to block all IPs except the IP of the build server and certain admin users such as @ACueva @conklinbd @elinz

Need to block access to the AGS, portal, data, db, geoevent servers.

Start by inspecting the repository's Python configuration scripts and the existing build-process disconnect logic. Trace how access rules are applied to the AGS, portal, data, db, and geoevent servers. Done means only the build server and the specified administrators can access those machines, while other IPs are blocked.

Written by the indexing model from the issue text.