Add options to build better java clients #235 (#236)

#235

Co-authored-by: Russe <Marc.Russe@gfi.ihk.de>

Author: marcdo7

cs3/storage/provider/v1beta1/provider_api.proto

@@ -20,6 +20,10 @@ syntax = "proto3";
 
 package cs3.storage.provider.v1beta1;
 
+option java_multiple_files = true;
+option java_outer_classname = "ProviderApiProto";
+option java_package = "com.cs3.storage.provider.v1beta1";
+
 import "cs3/identity/user/v1beta1/resources.proto";
 import "cs3/rpc/v1beta1/status.proto";
 import "cs3/storage/provider/v1beta1/resources.proto";