Clear config on configVersion change:
Clear config on configVersion change:

A v7 test failed when we restore the full config object.
Try restoring only the two fields that get changed.

[#1702476450](https://www.pivotaltracker.com/story/show/170247645)

Authored-by: Eric Promislow <6c389fa4d719bbeec88fea52ca3b2497804923ad@suse.com>

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli