186 scraping room fix

[leanmas]

Remove database constraint of rooms having to have a floor linked.
Scraping now might create new room objects (created only if a room with the same full_name doesn't exist yet) that have no floor and no building linked and are thus not visible on the map, but people now have the new scraped room objects linked. Also those new room objects link to all the people that are located in that room.

[codecov]

Codecov Report

Merging #280 (023ae1e) into dev (84d1f73) will increase coverage by 0.18%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #280      +/-   ##
==========================================
+ Coverage   78.93%   79.12%   +0.18%     
==========================================
  Files          52       52              
  Lines        1054     1054              
==========================================
+ Hits          832      834       +2     
+ Misses        222      220       -2     

Impacted Files	Coverage Δ
app/models/room.rb	100.00% <100.00%> (ø)
lib/scraping/scraper.rb	95.83% <100.00%> (ø)
lib/scraping/problem_checker.rb	89.74% <0.00%> (+5.12%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 84d1f73...023ae1e. Read the comment docs.

[kpostnov]

I don't know whether there is still time for this, but the tests are red in this one.
Furthermore, I couldn't check what happens when you click "Show on map" on rooms that have no building / floors linked.