grim/convey

update convey/clean to use the Runtime.ConfigPath instead of the working directory.

Fixes CONVEY-189
default-plan: everything
tasks:
one:
type: docker/run
image: alpine:edge
command: echo one
two:
type: docker/run
image: alpine:edge
command: echo two
plans:
plan1:
stages:
- tasks:
- one
plan2:
stages:
- tasks:
- two
meta-plans:
default:
plans:
- plan1
- plan2