added pricing service costs graph
Merge remote-tracking branch 'allegro_ralph_pricing/services-cost-graph' into feature/services-pricing-service-cost-graph
added pricing service unit tests; added extra cost forecast; minor fixes
added usages generator; fixed report
fixed flake
add costs moved outside distribute costs
added basic docstring to costs distribution
Merge pull request #258 from mkurek/feature/services-pricing-service-cost-graph

Feature/services pricing service cost graph