Add possibility to update housing corporation

[julienrbrt]

• When fetching houses, check if the city exists in the database, if not add it to the corporation (because the corporation now supports that city) -> in order to avoid doing a check at each request, store the list of city in an array and check it against the database.
• Add tools to update housing corporation based on their Info
• When reacting to an offer the users should be sorted by creation date (earlier first) and plan (pro first)

[julienrbrt]

Updating of housing corporation will be done as a manual flow (as it does not happen all the time): https://github.com/WoningFinder/org/commit/63c621a5944e201f8483921a34bb50ec3bcaf43c