v.io/x/ref/lib/vdl/codegen/java: use new verror interface
v.io/x/ref/lib/vdl/codegen/java: use new verror interface

Change-Id: Ia291ed7d5241deb6e61c308f78814fddbed5d6e2

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref