Add and populate crown column to services and services_history

- Added the boolean 'crown' column to services and services_history tables
- We populate this column in the same migration script by checking the
'organisation_type' of a service

app/dao/services_dao.py

@@ -172,6 +172,7 @@ def dao_create_service(service, user, service_id=None, service_permissions=None)
     service.id = service_id or uuid.uuid4()  # must be set now so version history model can use same id
     service.active = True
     service.research_mode = False
+    service.crown = service.organisation_type == 'central'
 
     for permission in service_permissions:
         service_permission = ServicePermission(service_id=service.id, permission=permission)

app/models.py

@@ -249,6 +249,7 @@ class Service(db.Model, Versioned):
         db.String(255),
         nullable=True,
     )
+    crown = db.Column(db.Boolean, index=False, nullable=False, default=True)
 
     association_proxy('permissions', 'service_permission_types')