demo bug with conflicting names

[stan-is-hate]

E.g.:

Failed to call out to plugin - Request to configure interaction failed: Failed to process protobuf: Message Point has no field 'latitude'. Fields are {"zlatitude", "zlongitude"}

Root cause:
https://github.com/pactflow/pact-protobuf-plugin/blob/main/src/mock_server.rs#L251
multiple calls to find_message_type_by_name ignore service name. This can cause issues when either configuring interactions or later when verifying it. Configuring interaction might go through if the fields are similar between two protos, e.g. if proto A1 and A2 have a common subset of fields, then if you only use that common subset when configuring interaction, it will be successful; however validation will fail because of the non-common part.