Use cover.out

Author: amogh09

Makefile

@@ -154,8 +154,8 @@ test-init:
 	go tool cover -func cover.out > coverprofile-init.out
 
 test-ecs-agent:
-	cd ecs-agent && GO111MODULE=on ${GOTEST} ${VERBOSE} -tags unit -mod vendor -coverprofile ../cover-ecs-agent.out -timeout=120s ./... && cd ..
-	go tool cover -func cover-ecs-agent.out > coverprofile-ecs-agent.out
+	cd ecs-agent && GO111MODULE=on ${GOTEST} ${VERBOSE} -tags unit -mod vendor -coverprofile ../cover.out -timeout=120s ./... && cd ..
+	go tool cover -func cover.out > coverprofile-ecs-agent.out
 
 test-silent:
 	cd agent && GO111MODULE=on ${GOTEST} -tags unit -mod vendor -coverprofile ../cover.out -timeout=120s ./... && cd ..