♻️ Refactoring web-server settings and removing trafaret from the repo

[pcrespov]

What do these changes do?

• removes trafaret from dependencies
• webserver upgrades to new app settings design
  • consider points in Configuration files in services #195 regarding configuration of a service

Related issue/s

How to test

Checklist

[codecov]

Codecov Report

Merging #2376 (80246ed) into master (32f6501) will decrease coverage by 10.9%.
The diff coverage is 83.3%.

@@            Coverage Diff            @@
##           master   #2376      +/-   ##
=========================================
- Coverage    74.2%   63.3%   -11.0%     
=========================================
  Files         518     351     -167     
  Lines       20320   12411    -7909     
  Branches     2012    1246     -766     
=========================================
- Hits        15093    7865    -7228     
+ Misses       4708    4288     -420     
+ Partials      519     258     -261     

Flag	Coverage Δ
integrationtests	?
unittests	63.3% <83.3%> (-4.5%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/service-library/src/servicelib/tracing.py	0.0% <0.0%> (ø)
packages/simcore-sdk/src/simcore_sdk/settings.py	100.0% <ø> (ø)
...core-sdk/src/simcore_sdk/node_ports/filemanager.py	45.7% <100.0%> (-33.8%)	⬇️
...es/storage/src/simcore_service_storage/settings.py	100.0% <100.0%> (ø)
...ackages/simcore-sdk/src/simcore_sdk/models/base.py	0.0% <0.0%> (-100.0%)	⬇️
...ges/simcore-sdk/src/simcore_sdk/models/__init__.py	0.0% <0.0%> (-100.0%)	⬇️
...es/sidecar/src/simcore_service_sidecar/mpi_lock.py	29.6% <0.0%> (-70.4%)	⬇️
...core-sdk/src/simcore_sdk/models/pipeline_models.py	0.0% <0.0%> (-64.6%)	⬇️
...re-sdk/src/simcore_sdk/node_ports/serialization.py	24.6% <0.0%> (-57.0%)	⬇️
...c/simcore_service_director_v2/utils/async_utils.py	32.7% <0.0%> (-56.9%)	⬇️
... and 200 more

[pcrespov]

Split into PRs #2716 and #2719