[infra] Further experimenting with travis build.
[infra] Further experimenting with travis build.

YOTOV-LIMITED/validator,YOTOV-LIMITED/validator,sammuelyee/validator,tripu/validator,takenspc/validator,validator/validator,validator/validator,YOTOV-LIMITED/validator,YOTOV-LIMITED/validator,takenspc/validator,takenspc/validator,takenspc/validator,tripu/validator,YOTOV-LIMITED/validator,takenspc/validator,sammuelyee/validator,sammuelyee/validator,validator/validator,tripu/validator,validator/validator,sammuelyee/validator,sammuelyee/validator,tripu/validator,tripu/validator,validator/validator