Server: Automatically load buildings into DB based on JSON config

[ShahmeerShahid]

Acceptance Criteria:

• When the server starts, if buildings are not present in the database, the required buildings are added
• The list of buildings added (along with all attributes) is read through a JSON/YAML configuration file ie I should only have to change the configuration file to change the building data that is loaded.
• There is no duplicate building data added into the database.

[create-issue-branch[bot]]

Branch issue-94-Server_Automatically_load_buildings_into_DB_based_on_JSON_config created!