fix #208

* added code to group entities by servicepath when multiple notifications arrive at once (#208)
* add tests and integration tests (so we have also test with orion triggering such case)
* fix notification tests to rely only on api calls (remove call to translator)
* changed error code to 400 when due to invalid request
* upgraded python to 3.8.5
* fix integration test to use new docker image with entrypoint (#362)

src/translators/sql_translator.py

@@ -206,7 +206,7 @@ def insert(self, entities, fiware_service=None, fiware_servicepath=None):
                                                         path)
         else:
             msg = 'Multiple servicePath are allowed only ' \
-                  'if their size is match the size of entities'
+                  'if their size match the size of entities'
             raise InvalidHeaderValue('Fiware-ServicePath',
                                      fiware_servicepath, msg)