Add note about JSON tests maybe being wrong.
- Add note about the JSON test maybe not being correct yet.
- Add test to checks the generated names for double underscores to be sure they
are what is expected.
Incase the different runtimes have different generation/implementations for
for the different primitive field types, cover a larger range of the proto
types in the oneof zero tests.
This involved fixing a few important bugs in the
Ruby implementation -- mostly cases of mixing
upb field types and descriptor types (upb field
types do not distinguish between int/sint/fixed/sfixed
like descriptor types do).
Also added protobuf-specific exceptions so parse
errors can be caught specifically.
Change-Id: Ib49d3db976900b2c6f3455c8b88af52cfb86e036
