Update loadgenerator Dockerfile to fix Pip incompatibility (#413)
Update loadgenerator Dockerfile to fix Pip incompatibility (#413)

* Update loadgenerator Dockerfile to fix Pip incompatibility

* Remove conditions to loadgenerator Dockerfile that are not reproducable

* Pin pip version to avoid PEP 517

* Pin python version in Loadgenerator Dockerfile, remove all other fixes

* See if Docker image python3.9-slim still passes the build

* See if python3.8 passes the build
GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo