test: allow travis-ci failure on go1.3
test: allow travis-ci failure on go1.3

travis-ci can't set up go1.3 env for now. Let's accept the failure on
go1.3 and see if this failure is permanent or not.

Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

a16/gobgp,Dipsingh/gobgp,ramrunner/gobgp,fujita/gobgp,fujita/gobgp,osrg/gobgp,tamihiro/gobgp,Dipsingh/gobgp,fujita/gobgp,ramrunner/gobgp,osrg/gobgp,a16/gobgp,ishidawataru/gobgp,ishidawataru/gobgp,j-kato/gobgp,fujita/gobgp,tamihiro/gobgp,j-kato/gobgp,tamihiro/gobgp,YujiOshima/gobgp,a16/gobgp,tamihiro/gobgp,osrg/gobgp,a16/gobgp,a16/gobgp,ramrunner/gobgp,Dipsingh/gobgp,j-kato/gobgp,a16/gobgp,YujiOshima/gobgp,a16/gobgp,ishidawataru/gobgp,osrg/gobgp,YujiOshima/gobgp