[ggj][parsing] fix: update messageTypes.get(simpleName) fix in HttpRuleParser (#548)

* fix: align resname ctors with superclass variants

* fix: avoid type collisions - refactor {Concrete,Vapor}Ref into AstNodes

* fix: better message null checks in Parser

* fix: map proto.Empty RPC types to void in ServiceClient

* fix: improve import(shortName) state-keeping in ImportWriterVisitor

* fix: fix stub pkg for all ServiceSettingsStub usages

* fix: handle older protos with javaMultipleFiles=false

* fix: gate isPaged on all fields for monolith back-compat

* fix: fail early if bazel lacks a grpc_service_config.json file

* fix: add Bazel handling for lack of resname helper classes

* fix: reverse conditional

* fix: handle floating-point types for test codegen assertEquals

* fix: handle older protos w/o java_mult_file and w/o java_outer_classname set

* fix: fix bidiStreamCall to use one param in ServiceClientTest codegen

* fix: update messageTypes.get(simpleName) fix in HttpRuleParser

Author: miraleung

src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java

@@ -62,7 +62,12 @@ public static Optional<List<String>> parseHttpBindings(
         String subField = descendantBindings[i];
         if (i < descendantBindings.length - 1) {
           Field field = containingMessage.fieldMap().get(subField);
-          containingMessage = messageTypes.get(field.type().reference().name());
+          containingMessage = messageTypes.get(field.type().reference().simpleName());
+          Preconditions.checkNotNull(
+              containingMessage,
+              String.format(
+                  "No containing message found for field %s with type %s",
+                  field.name(), field.type().reference().simpleName()));
         } else {
           checkHttpFieldIsValid(subField, containingMessage, false);
         }