valkyrie-46

Rename valkyrieConfig in k8sConfig.js to valkyrieEnv. Create valkyrie-config-service to retrieve configuration defaults from valkyrie instead of using environment variables. Removed unused environment variables from k8sConfig.js. Removed unused Valkyrie environment variables from README.md. Create mission-app-group class to create the Group manifests. Create mision-app-group-project to create the GroupProjectManifests. Update mission-app-service to take in a MissionAppCustomResource object and create a custom resource definition using its configuration values. Update mission-app-api to retrieve the valkyrie configuration using the valkyrie-config-service when posting a new mission app and retrieving the mission app defaults json. Add new environment variable (VALKYRIE_CONFIG_MAP) to k8sConfig and Updated README. Updated tests. References platform-one/party-bus/valkyrie/valkyrie-api#46 (closed)