use declarative_base for all ORM models

This rewrites the entire model base as declarative models.
This allows us to more easily customize overlay fields
in tables and is more common.

This effort also brought some DB violations to light which
this commit addresses.

Signed-off-by: Kevin Morris <kevr@0cost.org>

test/test_session.py

@@ -10,12 +10,12 @@ from aurweb.models.session import Session, generate_unique_sid
 from aurweb.models.user import User
 from aurweb.testing import setup_test_db
 
-user = session = None
+account_type = user = session = None
 
 
 @pytest.fixture(autouse=True)
 def setup():
-    global user, session
+    global account_type, user, session
 
     setup_test_db("Users", "Sessions")
 
@@ -35,7 +35,10 @@ def test_session():
 
 def test_session_cs():
     """ Test case sensitivity of the database table. """
-    session_cs = create(Session, UsersID=user.ID,
+    user2 = create(User, Username="test2", Email="test2@example.org",
+                   ResetKey="testReset2", Passwd="testPassword",
+                   AccountType=account_type)
+    session_cs = create(Session, UsersID=user2.ID,
                         SessionID="TESTSESSION",
                         LastUpdateTS=datetime.utcnow().timestamp())
     assert session_cs.SessionID == "TESTSESSION"