Drop authorizer wrapper

The openshift authorizer was wrapping kube authorizer only to generate
Forbidden messages, but upstream already generate similar messages and we
cannot intercept and change those. So let's just stop duplicating errors
and use the upstream authorizer and error messages as is.

Signed-off-by: Simo Sorce <simo@redhat.com>

pkg/authorization/authorizer/browsersafe/authorizer_test.go

@@ -13,6 +13,7 @@ func TestBrowserSafeAuthorizer(t *testing.T) {
 
 		expectedVerb        string
 		expectedSubresource string
+		expectedReason      string
 	}{
 		"non-resource": {
 			attributes:   authorizer.AttributesRecord{ResourceRequest: false, Verb: "GET"},
@@ -29,15 +30,18 @@ func TestBrowserSafeAuthorizer(t *testing.T) {
 			attributes:          authorizer.AttributesRecord{ResourceRequest: true, Verb: "get", Resource: "pods", Subresource: "proxy"},
 			expectedVerb:        "get",
 			expectedSubresource: "unsafeproxy",
+			expectedReason:      "proxy subresource changed to unsafeproxy",
 		},
 		"unsafe proxy verb": {
-			attributes:   authorizer.AttributesRecord{ResourceRequest: true, Verb: "proxy", Resource: "nodes"},
-			expectedVerb: "unsafeproxy",
+			attributes:     authorizer.AttributesRecord{ResourceRequest: true, Verb: "proxy", Resource: "nodes"},
+			expectedVerb:   "unsafeproxy",
+			expectedReason: "proxy verb changed to unsafeproxy",
 		},
 		"unsafe proxy verb anonymous": {
 			attributes: authorizer.AttributesRecord{ResourceRequest: true, Verb: "proxy", Resource: "nodes",
 				User: &user.DefaultInfo{Name: "system:anonymous", Groups: []string{"system:unauthenticated"}}},
-			expectedVerb: "unsafeproxy",
+			expectedVerb:   "unsafeproxy",
+			expectedReason: "proxy verb changed to unsafeproxy",
 		},
 
 		"proxy subresource authenticated": {
@@ -51,7 +55,7 @@ func TestBrowserSafeAuthorizer(t *testing.T) {
 		safeAuthorizer := NewBrowserSafeAuthorizer(delegateAuthorizer, "system:authenticated")
 
 		authorized, reason, err := safeAuthorizer.Authorize(tc.attributes)
-		if authorized == authorizer.DecisionAllow || len(reason) != 0 || err != nil {
+		if authorized == authorizer.DecisionAllow || reason != tc.expectedReason || err != nil {
 			t.Errorf("%s: unexpected output: %v %s %v", name, authorized, reason, err)
 			continue
 		}