Removal of cdn rdbms driver and pop support from olympus (#551)

* Inital removal of cdn rdbms driver and pop support from olympus

* Update travis and other unit test scripts

* Remove postgres from Makefile

* Update comments and remove function that is not required

* Update .env file

* clean commented code

* Update docs to remove references to rdbms

* Remove pop and run dep ensure to make sure that the tests pass without pop

* Keeping GO_ENV=test for parametter logging

docker-compose.yml

@@ -9,13 +9,6 @@ services:
     image: mongo:3.7.9-jessie
     ports:
       - 27017:27017
-  postgres:
-    image: postgres:9.6.9-alpine
-    ports:
-      - "5432:5432"
-    environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
   minio:
     image: minio/minio:latest
     command: server /data