patch(building_file): update buildingfile property state to link scenarios

[macintoshpie]

Any background context you want to provide?

Bug: update with buildingsync resulted in scenarios from new file not getting linked to new property state

What's this PR do?

Fixes that

Also adds tests for BuildingFile that were taken from the bricr branch

How should this be manually tested?

• Upload bricr workflow buildingsync file, verify scenarios were uploaded on the property details page. Also go to Meters page and verify that you see the meter data and can filter by scenario.
• Do an "Update with buildingsync" with the same file again, and verify you still see scenarios as well as the meter data
• Do an "Update with buildingsync" with ex1.xml (has no scenarios or meter data) and the scenarios and meters should not be shown (they are no longer linked to the current property state)

[coveralls]

Coverage increased (+0.09%) to 77.622% when pulling 1508222 on patch/buildingfile-scenario-link into 74b48be on develop.

[adrian-lara]

Looks good - code changes were very similar to the bricr-dev-version of this PR.

I tested the "Update with BuildingSync" in both cases where scenarios & meters should and shouldn't be created.