manual provider: failed bootstrap leaves .jenv file behind

[Aaron Bentley]

After bootstrap fails, (e.g. bug #1282235) a .jenv file is left behind. Running juju destroy-environment won't delete it.

$ juju destroy-environment manual
WARNING! this command will destroy the "manual" environment (type: manual)
This includes all machines, services, data and other resources.

Continue [y/N]? y
ERROR Get http://54.80.141.151:8040/provider-state: dial tcp 54.80.141.151:8040: connection refused
$ juju destroy-environment manual --force
WARNING! this command will destroy the "manual" environment (type: manual)
This includes all machines, services, data and other resources.

Continue [y/N]? y
ERROR exit status 1
abentley@speedy:~/canonical/ci-cd-scripts2$ ls manual-provider-home/environments
manual.jenv