Ensure that logger writes to stdout

Previously, if an ~/.ecr/log directory existed, the logger would write
to ~/.ecr/log/ecr-login.log instead of stdout. This would result in
commands seeming to hang or exist immediately. This ensures logs are
written correctly to stdout.

Fixes aws#675

ecs-cli/main.go

@@ -25,7 +25,7 @@ import (
 	"github.com/aws/amazon-ecs-cli/ecs-cli/modules/commands/license"
 	"github.com/aws/amazon-ecs-cli/ecs-cli/modules/commands/log"
 	"github.com/aws/amazon-ecs-cli/ecs-cli/modules/commands/regcreds"
-	logger "github.com/awslabs/amazon-ecr-credential-helper/ecr-login/config"
+	"github.com/aws/amazon-ecs-cli/ecs-cli/modules/utils/logger"
 	"github.com/aws/amazon-ecs-cli/ecs-cli/modules/version"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"

ecs-cli/modules/utils/logger/logger.go

@@ -0,0 +1,28 @@
+// Copyright 2015-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"). You may
+// not use this file except in compliance with the License. A copy of the
+// License is located at
+//
+//     http://aws.amazon.com/apache2.0/
+//
+// or in the "license" file accompanying this file. This file is distributed
+// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+// express or implied. See the License for the specific language governing
+// permissions and limitations under the License.
+
+package logger
+
+import (
+	"os"
+	"github.com/sirupsen/logrus"
+)
+
+func SetupLogger() {
+	logrusConfig()
+}
+
+func logrusConfig() {
+	logrus.SetLevel(logrus.InfoLevel)
+	logrus.SetOutput(os.Stdout)
+}