test: upgrade grpc test fixture to 1.22.2 (#1071)

Author: kjin

test/fixtures/plugin-fixtures.json

@@ -29,9 +29,9 @@
       "google-gax": "^0.16.0"
     }
   },
-  "grpc1.20": {
+  "grpc1.22": {
     "dependencies": {
-      "grpc": "^1.20.2"
+      "grpc": "^1.22.2"
     }
   },
   "hapi-plugin-mysql3": {

test/plugins/test-trace-grpc.ts

@@ -379,7 +379,7 @@ describeInterop('grpc', fixture => {
         };
         var clientTrace = assertTraceProperties(grpcClientPredicate);
         assert.strictEqual(clientTrace.labels.status,
-            '{"code":0,"details":"OK","metadata":{"_internal_repr":{}}}');
+            '{"code":0,"details":"OK","metadata":{"_internal_repr":{},"flags":0}}');
         assertTraceProperties(grpcServerOuterPredicate);
         // Check that a child span was created in gRPC root span 
         assert(common.getMatchingSpan(grpcServerInnerPredicate));
@@ -402,7 +402,7 @@ describeInterop('grpc', fixture => {
         };
         var clientTrace = assertTraceProperties(grpcClientPredicate);
         assert.strictEqual(clientTrace.labels.status,
-            '{"code":0,"details":"OK","metadata":{"_internal_repr":{}}}');
+            '{"code":0,"details":"OK","metadata":{"_internal_repr":{},"flags":0}}');
         assertTraceProperties(grpcServerOuterPredicate);
         // Check that a child span was created in gRPC root span 
         assert(common.getMatchingSpan(grpcServerInnerPredicate));