* Fix Python3 errors for device tests
The Python3 migration didn't include fixes for local scripts in the
device test tree.
Fatal build and run Python errors fixed.
The last update to xunitmerge is ~5 years ago, so it looks to be
unsupported now.
Use a local copy of the two components to allow patching to work with
Python3.
The serial test seems to send garbage chars (non-ASCII/etc.), so use a
codepage 437 which supports all 255 chars.
Fixes: #6660
* Run tests at 160MHz (req'd for some SSL connections)
* Fix debuglevel options for builder
* Fix Python3 interpreter path in xunitmerge
* Remove virtualenv on "make clean"
* Add appropriate attribution, license to xunitmerge
Add like to the original sources with the author's license to the
copied/fixed xunitmerge files.
* device test for #4516 (WiFiClient leaking)
* simply count the number of connections that do not change heap
* remove unused heapLost
* + python server (to not depend on gateway's opened tcp port)
* remove old&bad define
* fix another old address
