Update minio docker image and minio-go dependency (#10770)

* update minio server1

* update minio go lib to use the latest release

Makefile

@@ -140,7 +140,8 @@ ifeq ($(IS_CI),false)
 	@if [ $(shell docker ps -a --no-trunc --quiet --filter name=^/mattermost-minio$$ | wc -l) -eq 0 ]; then \
 		echo starting mattermost-minio; \
 		docker run --name mattermost-minio -p 9001:9000 -e "MINIO_ACCESS_KEY=minioaccesskey" \
-		-e "MINIO_SECRET_KEY=miniosecretkey" -d minio/minio:RELEASE.2018-05-25T19-49-13Z server /data > /dev/null; \
+		-e "MINIO_SSE_MASTER_KEY=my-minio-key:6368616e676520746869732070617373776f726420746f206120736563726574" \
+		-e "MINIO_SECRET_KEY=miniosecretkey" -d minio/minio:RELEASE.2019-04-23T23-50-36Z server /data > /dev/null; \
 		docker exec -it mattermost-minio /bin/sh -c "mkdir -p /data/mattermost-test" > /dev/null; \
 	elif [ $(shell docker ps --no-trunc --quiet --filter name=^/mattermost-minio$$ | wc -l) -eq 0 ]; then \
 		echo restarting mattermost-minio; \