.travis.yml: add go 1.7.x
.travis.yml: add go 1.7.x

Signed-off-by: Antonio Murdaca <f9809039ea4850e75dcb8d80b778844aa463358f@redhat.com>

phinnaeus/cli,minio/cli,pjvds/cli,minio/cli,pjvds/cli,minio/cli,murdinc/cli,urfave/cli,codegangsta/cli,pjvds/cli,phinnaeus/cli,murdinc/cli,codegangsta/cli,urfave/cli,murdinc/cli,phinnaeus/cli