This change implements data object models from [0] in data extraction
and parsing. The change results in minor modifications to the outputted
intermediary, which can be seen between these two example intermeidary
files [1].
This fully implements the data objects from models.py in data extraction
and parsing. A follow-up change will implement use of the data objects
in Jinja2. Temporarily, all objects will be converted to dictionaries
for generating documents from templates.
[0] https://review.opendev.org/#/c/658917/
[1] https://www.diffchecker.com/NnjjJrb2
Change-Id: Ifd867787aab541be5dabecf9f6026faa2ec7049e
Ian H. Pittwood