Reverted accidental change to the Makefile that occurred while rebasing hmhealey/mm1494 branch

Makefile

@@ -43,7 +43,7 @@ build:
 install:
 	@go get $(GOFLAGS) github.com/tools/godep
 
-	@if [ $(shell docker ps | grep -ci mattermost-mysql) -eq 0 ]; then \
+	@if [ $(shell docker ps -a | grep -ci mattermost-mysql) -eq 0 ]; then \
 		echo starting mattermost-mysql; \
 		docker run --name mattermost-mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=mostest \
     	-e MYSQL_USER=mmuser -e MYSQL_PASSWORD=mostest -e MYSQL_DATABASE=mattermost_test -d mysql > /dev/null; \