use istio client-go library instead of knative (#1661)

use istio client-go library instead of knative
bump kubernetes dependency version
change code coverage to codecov

vendor/istio.io/api/mixer/v1/config/client/service.proto

@@ -0,0 +1,58 @@
+// Copyright 2017 Istio Authors
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License 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.
+
+syntax = "proto3";
+
+package istio.mixer.v1.config.client;
+
+option go_package="istio.io/api/mixer/v1/config/client";
+
+import "gogoproto/gogo.proto";
+
+option (gogoproto.goproto_getters_all) = false;
+option (gogoproto.equal_all) = false;
+option (gogoproto.gostring_all) = false;
+option (gogoproto.stable_marshaler_all) = true;
+
+// NOTE: this is a duplicate of proxy.v1.config.IstioService from
+// proxy/v1alpha1/config/route_rules.proto.
+//
+// Mixer protobufs have gogoproto specific options which are not
+// compatiable with the proxy's vanilla protobufs. Ideally, these
+// protobuf options be reconciled so fundamental Istio concepts and
+// types can be shared by components. Until then, make a copy of
+// IstioService for mixerclient to use.
+
+// IstioService identifies a service and optionally service version.
+// The FQDN of the service is composed from the name, namespace, and implementation-specific domain suffix
+// (e.g. on Kubernetes, "reviews" + "default" + "svc.cluster.local" -> "reviews.default.svc.cluster.local").
+message IstioService {
+  // The short name of the service such as "foo".
+  string name = 1;
+
+  // Optional namespace of the service. Defaults to value of metadata namespace field.
+  string namespace = 2;
+
+  // Domain suffix used to construct the service FQDN in implementations that support such specification.
+  string domain = 3;
+
+  // The service FQDN.
+  string service = 4;
+
+  // Optional one or more labels that uniquely identify the service version.
+  //
+  // *Note:* When used for a VirtualService destination, labels MUST be empty.
+  //
+  map<string, string> labels = 5;
+}