Do not leak database connections

kmip/services/server/engine.py

@@ -355,7 +355,8 @@ class KmipEngine(object):
     def _process_batch(self, request_batch, batch_handling, batch_order):
         response_batch = list()
 
-        self._data_session = self._data_store_session_factory()
+        with self._data_store_session_factory() as session:
+            self._data_session = session
 
             for batch_item in request_batch:
                 error_occurred = False

kmip/version.py

@@ -13,4 +13,4 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-__version__ = "0.11.0dev1"
+__version__ = "0.11.0.dev1"