fix native image tests

Author: rahul2393

google-cloud-spanner/src/main/resources/META-INF/native-image/com.google.cloud.spanner/grpc-gcp-reflect-config.json

@@ -0,0 +1,56 @@
+[
+  {
+    "name": "com.google.cloud.grpc.proto.ApiConfig",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.ApiConfig$Builder",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.ChannelPoolConfig",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.ChannelPoolConfig$Builder",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.MethodConfig",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.MethodConfig$Builder",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.AffinityConfig",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.AffinityConfig$Builder",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  },
+  {
+    "name": "com.google.cloud.grpc.proto.AffinityConfig$Command",
+    "allDeclaredFields": true,
+    "allDeclaredMethods": true,
+    "allDeclaredConstructors": true
+  }
+]

google-cloud-spanner/src/main/resources/META-INF/native-image/native-image.properties

@@ -2,4 +2,5 @@ Args = --initialize-at-build-time=com.google.cloud.spanner.IntegrationTestEnv,\
   org.junit.experimental.categories.CategoryValidator,\
   org.junit.validator.AnnotationValidator,\
   java.lang.annotation.Annotation \
+  -H:ReflectionConfigurationResources=${.}/com.google.cloud.spanner/grpc-gcp-reflect-config.json \
   --features=com.google.cloud.spanner.nativeimage.SpannerFeature