refactor(bigtable): remove production dependency on grpc admin service stub

Author: jinseopkim0

java-bigtable/google-cloud-bigtable/pom.xml

@@ -278,9 +278,11 @@
       <classifier>testlib</classifier>
       <scope>test</scope>
     </dependency>
+
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>grpc-google-cloud-bigtable-admin-v2</artifactId>
+      <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.google.cloud</groupId>

java-bigtable/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BigtableTableAdminClientV2.java

@@ -30,7 +30,6 @@
 import com.google.api.gax.rpc.OperationCallable;
 import com.google.api.gax.rpc.UnaryCallSettings;
 import com.google.api.gax.rpc.UnaryCallable;
-import com.google.bigtable.admin.v2.BigtableTableAdminGrpc;
 import com.google.bigtable.admin.v2.OptimizeRestoredTableMetadata;
 import com.google.bigtable.admin.v2.TableName;
 import com.google.cloud.bigtable.admin.v2.stub.AwaitConsistencyCallableV2;
@@ -169,7 +168,12 @@ private static AwaitConsistencyCallableV2 createAwaitConsistencyCallable(
     // encapsulates
     // its own channel. The initial RPC is never called through this OperationCallable.
     MethodDescriptor<Void, Operation> fakeDescriptor =
-        BigtableTableAdminGrpc.getRestoreTableMethod().toBuilder(
+        MethodDescriptor.<Void, Operation>newBuilder()
+            .setType(MethodDescriptor.MethodType.UNARY)
+            .setFullMethodName(
+                MethodDescriptor.generateFullMethodName(
+                    "google.bigtable.admin.v2.BigtableTableAdmin", "RestoreTable"))
+            .setRequestMarshaller(
                 new Marshaller<Void>() {
                   @Override
                   public InputStream stream(Void value) {
@@ -180,8 +184,9 @@ public InputStream stream(Void value) {
                   public Void parse(InputStream stream) {
                     throw new UnsupportedOperationException();
                   }
-                },
-                BigtableTableAdminGrpc.getRestoreTableMethod().getResponseMarshaller())
+                })
+            .setResponseMarshaller(
+                io.grpc.protobuf.ProtoUtils.marshaller(Operation.getDefaultInstance()))
             .build();
 
     GrpcCallSettings<Void, Operation> unusedInitialCallSettings =