Bug#1117950: FTBFS against snakeyaml 2.5+ds-1 in experimental

[Vladimir Petko]

Hi Pierre,

jtreg7 (8) is used in backports, and since snakeyaml upgrade breaks a
few packages, I will vendor snakeyaml 1.x in line with other packages
that jtreg vendors.


Best Regards,
 Vladimir.