Maintenance/upgrades test tools

[pcrespov]

What do these changes do?

• Updates libraries used for testing (e.g. _test.txt) but not base requirements
• Moves all .vscode-templates/*.json to .vscode/*.template.json. Can be easily applied by removing extension

[codecov]

Codecov Report

Merging #1628 into master will decrease coverage by 1.0%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #1628     +/-   ##
========================================
- Coverage    74.7%   73.7%   -1.1%     
========================================
  Files         241     278     +37     
  Lines        9868   10884   +1016     
  Branches     1066    1178    +112     
========================================
+ Hits         7381    8029    +648     
- Misses       2169    2514    +345     
- Partials      318     341     +23     

Flag	Coverage Δ
#integrationtests	56.7% <ø> (ø)
#unittests	67.4% <ø> (-3.1%)	⬇️

Impacted Files	Coverage Δ
...ce_webserver/resource_manager/garbage_collector.py	72.0% <0.0%> (ø)
packages/service-library/src/servicelib/utils.py	67.5% <0.0%> (ø)
...ce-library/src/servicelib/jsonschema_validation.py	0.0% <0.0%> (ø)
...service-library/src/servicelib/openapi_wrappers.py	70.8% <0.0%> (ø)
...service-library/src/servicelib/jsonschema_specs.py	0.0% <0.0%> (ø)
...kages/service-library/src/servicelib/decorators.py	76.1% <0.0%> (ø)
...ges/service-library/src/servicelib/celery_utils.py	0.0% <0.0%> (ø)
.../service-library/src/servicelib/rest_validators.py	90.6% <0.0%> (ø)
...ce-library/src/servicelib/simcore_service_utils.py	0.0% <0.0%> (ø)
...s/service-library/src/servicelib/rabbitmq_utils.py	0.0% <0.0%> (ø)
... and 36 more