added locust facilities with more workers

[sanderegg]

What do these changes do?

Locust is a tool that allows to call entrypoints in parallel and get a nice graph from that.. it allows for testing our deployments.

• adds make build to create our own locust app in a docker
• adds make up target=LOCUST_FILE.py
• adds docker-compose locust
• adds some files for testing director-v0 /services, webserver /catalog/services

Related issue/s

replaces #2308

How to test

Checklist

[codecov]

Codecov Report

Merging #2314 (3ed9dd4) into master (ccc86f7) will increase coverage by 0.0%.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #2314   +/-   ##
======================================
  Coverage    71.7%   71.8%           
======================================
  Files         506     506           
  Lines       19912   19912           
  Branches     1949    1949           
======================================
+ Hits        14296   14297    +1     
+ Misses       5141    5140    -1     
  Partials      475     475           

Flag	Coverage Δ
integrationtests	62.0% <ø> (-0.1%)	⬇️
unittests	67.1% <ø> (ø)

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

Impacted Files	Coverage Δ
...ce_webserver/resource_manager/garbage_collector.py	74.8% <0.0%> (-1.0%)	⬇️
...webserver/computation_comp_tasks_listening_task.py	91.3% <0.0%> (+3.2%)	⬆️