Use upstream proxy for docker unit and e2e tests. (#1394)

* Adds cataloger for Azure Blob storage

* Revert "Adds cataloger for Azure Blob storage"

This reverts commit 9476c9e256.

* Implements Cataloger interface for Azure blob storage. Fixes #995.

* Upgraded azblob version to v0.7.0

* Upgrades azblob version to v0.7.0

* Fix formatting

* Fix formatting issues

* Use keyed field for comp literal

* reorder import pkgs

* Use upstream proxy in test containers

* delete unwanted file

* Updates GOLANG_VERSION for docker tests

docker-compose.yml

@@ -18,7 +18,7 @@ services:
       context: .
       dockerfile: Dockerfile.test
       args:
-        GOLANG_VERSION: 1.12
+        GOLANG_VERSION: 1.13
     command: ["./scripts/test_unit.sh"]
     environment:
       - GO_ENV=test
@@ -34,7 +34,7 @@ services:
       context: .
       dockerfile: Dockerfile.test
       args:
-        GOLANG_VERSION: 1.12
+        GOLANG_VERSION: 1.13
     command: ["./scripts/test_e2e.sh"]
   azurite:
     image: arafato/azurite:2.6.5