Fix metadata labels of manifest

[whs-dot-hk]

Greetings @blaggacao, found a bug while using the blocktype kubectl, below is the explaination

Context

In yaml (manifest), metadata.labels can be null
e.g.

metadata:
  labels:

or

metadata:
  labels: null

instead of the standard

metadata:
  labels: {}

Which cause the dmerge in amendAlways fails

       error:
       rigt-hand-side must be of the same type as left-hand-side
       at 'metadata.labels':
       - lhs: null @ undetectable posision
       - rhs: set @ /nix/store/z6hf8dcim8qdgs0nh6bvf52x0w2zzkpf-incl/std/fwlib/blockTypes/kubectl.nix:62:21

Solution

Patch the edge case, with manifest.metadata.labels = {}; before doing dmerge (now lhs will also be a set).

[blaggacao]

Thanks a lot! This looks good!