Need to separate Portal URL, ArcGIS Server URL and Web App Url in all url replacement logic

Currently, the url replacement methodology assumes that all the urls are going to a single server. We need to be able to split this so we can publish to a configuration which is split.

Here is the pattern (I think).

Portal Machine or Hosted apps
http(s)://servername/arcgis/home
http(s)://servername/arcgis/sharing

Server
http(s)://servername:(port optional)/arcgis/rest/

Web Apps
http(s)://servername/SolutionsWeb/

There will be a related issue to deal with hosted web apps since their pattern/id's is different then the pattern for portal.

Start by locating the URL replacement logic in the Python configuration scripts and trace how a single server URL is currently used. Verify the Portal, ArcGIS Server, and Web App URL patterns described in the issue, including optional Server ports. Done means split configurations can be published successfully; hosted web app patterns are explicitly deferred to the related issue.

Written by the indexing model from the issue text.