support simple global exception for NotFound and Operational Sqlalchemy error

setup.py

     'zope.sqlalchemy',
     'alembic',
     # API
-    'hapic',
+    'hapic>=0.40',
     'marshmallow <3.0.0a1,>2.0.0',
     # CLI
     'cliff',

tracim/__init__.py

 from pyramid.config import Configurator
 from pyramid.authentication import BasicAuthAuthenticationPolicy
 from hapic.ext.pyramid import PyramidContext
+from pyramid.exceptions import NotFound
+from sqlalchemy.exc import OperationalError
 
 from tracim.extensions import hapic
 from tracim.config import CFG
     # Add SqlAlchemy DB
     configurator.include('.models')
     # set Hapic
-    hapic.set_context(
-        PyramidContext(
-            configurator=configurator,
-            default_error_builder=ErrorSchema()
-        )
+    context = PyramidContext(
+        configurator=configurator,
+        default_error_builder=ErrorSchema()
     )
+    hapic.set_context(context)
+    context.handle_exception(NotFound, 404)
+    context.handle_exception(OperationalError, 500)
     # Add controllers
     session_api = SessionController()
     configurator.include(session_api.bind, route_prefix=BASE_API_V2)

tracim/tests/functional/test_session.py

 
 class TestLoginEndpointUnititedDB(FunctionalTestNoDB):
 
-    @pytest.mark.xfail(raises=OperationalError,
-                       reason='Not supported yet by hapic')
     def test_api__try_login_enpoint__err_500__no_inited_db(self):
         params = {
             'email': 'admin@admin.admin',