WS-239 problem: argparse is not behaving as advertised; should auto-generate help, but throws SystemExit(0)

- aat_wrest: utility for pulling metadata for calibration templates
- wf_framework: contains script for setting up CASA processing directory structure

WS-239 and WS-184: failing tests are disabled pending rewrite, AND passing around of namespaces is eliminated. It would've been difficult to do in two pieces.

WS-239 and WS-184: failing tests are disabled pending rewrite, AND passing around of namespaces is eliminated. It would've been difficult to do in two pieces.

This reverts commit 48361c15.

* args are accessed only in locations_report.__init()__
* directory/file-related errors throw custom exception

 - New DestinationTempFile for writing tempfiles into the destination which eventually get added
 - All of the close() methods are now streaming
 - Implemented ChecksumDecorator
 - Implemented FetchFile decorator

 - New DestinationTempFile for writing tempfiles into the destination which eventually get added
 - All of the close() methods are now streaming
 - Implemented ChecksumDecorator
 - Implemented FetchFile decorator

* refactored LocationReport accepts a List[str] rather than a namespace
* created stand-in for archive service so that tests won't hit the real one

This reverts commit 08dbc452.

* refactored LocationReport accepts a List[str] rather than a namespace
* created stand-in for archive service so that tests won't hit the real one

Changed workflow temp location from `$(HOME)/workspaces_tmp` (`/root/workspaces_tmp` in the container) to `/tmp/workspaces_tmp`