Fix on-premises term in error string and comments

pkg/cloudprovider/providers/aws/aws.go

@@ -403,7 +403,7 @@ type CloudConfig struct {
 		Zone string
 
 		// The AWS VPC flag enables the possibility to run the master components
-		// on a different aws account, on a different cloud provider or on-premise.
+		// on a different aws account, on a different cloud provider or on-premises.
 		// If the flag is set also the KubernetesClusterTag must be provided
 		VPC string
 		// SubnetID enables using a specific subnet to use for ELB's
@@ -876,9 +876,9 @@ func newAWSCloud(config io.Reader, awsServices Services) (*Cloud, error) {
 	awsCloud.instanceCache.cloud = awsCloud
 
 	if cfg.Global.VPC != "" && cfg.Global.SubnetID != "" && (cfg.Global.KubernetesClusterTag != "" || cfg.Global.KubernetesClusterID != "") {
-		// When the master is running on a different AWS account, cloud provider or on-premise
+		// When the master is running on a different AWS account, cloud provider or on-premises
 		// build up a dummy instance and use the VPC from the nodes account
-		glog.Info("Master is configured to run on a different AWS account, different cloud provider or on-premise")
+		glog.Info("Master is configured to run on a different AWS account, different cloud provider or on-premises")
 		awsCloud.selfAWSInstance = &awsInstance{
 			nodeName: "master-dummy",
 			vpcID:    cfg.Global.VPC,