Changelog and version updates for v0.127.0
Ignore coverage binaries
Remove trailing whitespace
Disable urllib3 warnings in test
PTFM-13795 session conf dir cleanup

Reviewed in https://github.com/dnanexus/dx-toolkit/pull/80.
Document the dxpy.utils module.

* Upgrade doc build dependencies
* Fix doc formatting for exec_utils
Merge branch 'master' into PTFM-8759-no-import-side-effects

Conflicts:
	src/python/dxpy/utils/exec_utils.py