Problems description:
Once we execute airshipctl config init, the default config in
~/.airship/config doesn't contain default values for:
currentContext: ~
clusters:
default:
clusterType:
target:
bootstrapInfo: ~
managementConfiguration: ~
---
This PS set default values for Airshipctl config to use it
out of the box.
Closes: #234
Change-Id: I57449e678f19ab1c0e2212c38b01ea195f62aa44
84f2bc60c9