Add EnsureComplete validation when setting config object in airshipctl cluster

[eak13]

Proposed change
When setting the config object, airshipctl cluster should use settings.Config.EnsureComplete() to validate that a config object is ready to use.

EnsureComplete does the following checks & returns an error if any one is not met.

• At least 1 Cluster is defined
• At least 1 AuthInfo (user) is defined
• At least 1 Context is defined
• At least 1 Manifest is defined
• The CurrentContext is set
• The CurrentContext identifies an existing Context
• The CurrentContext identifies an existing Manifest

Potential impacts
This will improve config object validations & identify potential issues upfront before continuing to execute the workflow.

[airshipbot]

Related Change #728557

Subject: Add EnsureComplete check to cluster init
Link: https://review.opendev.org/728557
Status: MERGED
Owner: Ian Howell (ian.howell0@gmail.com)

This change will close this issue when merged.

Approvals

Code-Review
+1 Ruslan Aliev
+1 Vladislav Kuzmin
+1 Stas Egorov
+2 Alexander Hughes
+2 Matt McEuen
Verified
+2 Zuul
Workflow
+1 Matt McEuen

Last Updated: 2020-05-19 23:45:03 CDT