use pflag instead of flag for better command line parsing

Author: dims

.gitignore

@@ -138,4 +138,5 @@ zz_generated.openapi.go
 # binaries
 /openstack-cloud-controller-manager
 /cinder-flex-volume-driver
-/cinder-provisioner
+/cinder-provisioner
+/k8s-keystone-auth

cmd/cinder-provisioner/main.go

@@ -17,7 +17,7 @@ limitations under the License.
 package main
 
 import (
-	"flag"
+	flag "github.com/spf13/pflag"
 
 	"git.openstack.org/openstack/openstack-cloud-controller-manager/pkg/volume/cinder/provisioner"
 	"github.com/golang/glog"

cmd/k8s-keystone-auth/main.go

@@ -15,7 +15,7 @@ limitations under the License.
 package main
 
 import (
-	"flag"
+	flag "github.com/spf13/pflag"
 	"log"
 	"net/http"