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_package.py

@@ -1,7 +1,7 @@
 import pytest
 
 from sqlalchemy import and_
-from sqlalchemy.exc import IntegrityError
+from sqlalchemy.exc import IntegrityError, OperationalError
 
 import aurweb.config
 
@@ -19,7 +19,7 @@ user = pkgbase = package = None
 def setup():
     global user, pkgbase, package
 
-    setup_test_db("Users", "PackageBases", "Packages")
+    setup_test_db("Packages", "PackageBases", "Users")
 
     account_type = query(AccountType,
                          AccountType.AccountType == "User").first()
@@ -57,17 +57,17 @@ def test_package():
     assert record is not None
 
 
-def test_package_ci():
+def test_package_package_base_cant_change():
     """ Test case insensitivity of the database table. """
     if aurweb.config.get("database", "backend") == "sqlite":
         return None  # SQLite doesn't seem handle this.
 
     from aurweb.db import session
 
-    with pytest.raises(IntegrityError):
+    with pytest.raises(OperationalError):
         create(Package,
                PackageBase=pkgbase,
-               Name="Beautiful-Package")
+               Name="invalidates-old-package-packagebase-relationship")
     session.rollback()