Imported test metadata should be stored in a reasonable order

[psss]

Currently tmt test convert stores yaml keys in random order. It would be nice to store the information in a way which is pleasant for user to read. For example summary, if present, should be the first. Implementation should be relatively easy using an OrderedDict.

The proposed order of the L1 Metadata keys:

• summary
• description
• contact
• test
• path
• duration
• environment
• tag
• tier
• component
• relevancy
• enabled
• result

[psss]

@hegerj, this might be an interesting stuff for you.

[hegerj]

"Changed in version 3.7: Dictionary order is guaranteed to be insertion order. This behavior was an implementation detail of CPython from 3.6."
https://docs.python.org/3.7/library/stdtypes.html#dict

Should I then bother with OrderedDict given the yaml.dump() issue?

[psss]

Seems the yaml.dump() method supports sort_keys=False parameter. So the only thing we need is to disable sorting and put the keys in the dictionary in the right order.