Swagger operation IDs modified after protobuf version update

[sarthakn7]

Due to grpc-ecosystem/grpc-gateway#1193, we have LuceneServer_ prepended to all operation IDs. The PR mentions that the maintainers will add a flag to go back to the previous behavior and we should update our protobuf dependency when that flag gets added.

Till then, we can run sed -i 's/LuceneServer_//g' luceneserver.swagger.json to get back the previous operation IDs. We can either run it manually or just add it to the generation step (risky if there is some other change in swagger generation and we replace something other than operation ID).

[johanbrandhorst]

Another option is to depend on the latest release - this change has not made it into a release yet. https://github.com/grpc-ecosystem/grpc-gateway/releases/tag/v1.14.3 does not change the format.