Add more JSON parser failure tests
Add more JSON parser failure tests

hntrmrrs/capnproto,maurer/capnproto,vladon/capnproto,mrdomino/capnproto,mrdomino/capnproto,hntrmrrs/capnproto,mologie/capnproto,mrdomino/capnproto,jparyani/capnproto,vladon/capnproto,maurer/capnproto,hntrmrrs/capnproto,rcrowder/capnproto,maurer/capnproto,mologie/capnproto,pjulien/capnproto,jparyani/capnproto,vladon/capnproto,jparyani/capnproto,pjulien/capnproto,rcrowder/capnproto,mologie/capnproto,pjulien/capnproto,rcrowder/capnproto