validate: yamllint: use "parsable" output
validate: yamllint: use "parsable" output

Before:

    10030:81  error    line too long (89 > 80 characters)  (line-length)

After:

    api/swagger.yaml:10030:81: [error] line too long (89 > 80 characters) (line-length)

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

trebonian/docker,Ramzec/docker,jimjag/docker,konstruktoid/docker-upstream,thaJeztah/docker,moul/docker,Mokolea/docker,konstruktoid/docker-upstream,cpuguy83/docker,Mokolea/docker,jimjag/docker,mahak/docker,moul/docker,jimjag/docker,Ramzec/docker,konstruktoid/docker-upstream,Mokolea/docker,Ramzec/docker,mahak/docker,moby/moby,moby/moby,trebonian/docker,thaJeztah/docker,mahak/docker,cpuguy83/docker,thaJeztah/docker,Mokolea/docker,moby/moby,moul/docker,moul/docker,mahak/docker,thaJeztah/docker,cpuguy83/docker,jimjag/docker,konstruktoid/docker-upstream,Ramzec/docker,moby/moby,trebonian/docker,cpuguy83/docker,trebonian/docker