Provider Statistics added.

Rates command added with a test.

Updated to include added migration.

tests/app/dao/test_provider_rates_dao.py

@@ -0,0 +1,14 @@
+from datetime import datetime
+from decimal import Decimal
+from app.dao.provider_rates_dao import create_provider_rates
+from app.models import ProviderRates
+
+
+def test_create_provider_rates(notify_db, notify_db_session, mmg_provider_name):
+    now = datetime.now()
+    rate = Decimal("1.00000")
+    create_provider_rates(mmg_provider_name, now, rate)
+    assert ProviderRates.query.count() == 1
+    assert ProviderRates.query.first().rate == rate
+    assert ProviderRates.query.first().valid_from == now
+    assert ProviderRates.query.first().provider == mmg_provider_name