#101 Team sharing tests

* adds tests for team sharing
* extends the API for team sharing support
* adds shared_teams property shortcut for ShareableObjectMixin
* adds full support for team-based sharing to all views and functions
* simplifies ShareModalForm
* adds/updates translations

api/tests/v1/get/test_api_get.py

@@ -85,6 +85,26 @@ class APIV1GetTestCase(BaseAPIV1TestCase):
         except KeyError as e:
             self.fail(e)
 
+    def test_get_shared(self):
+        """ Tests api GET on shared info of the intervention
+
+        Returns:
+
+        """
+        self.intervention.share_with_user(self.superuser)
+        self.intervention.share_with_team(self.team)
+        url = reverse("api:v1:intervention-share", args=(str(self.intervention.id),))
+        response = self._run_get_request(url)
+        content = json.loads(response.content)
+        self.assertIn("users", content)
+        self.assertIn(self.superuser.username, content["users"])
+        self.assertEqual(1, len(content["users"]))
+        self.assertIn("teams", content)
+        self.assertEqual(1, len(content["teams"]))
+        for team in content["teams"]:
+            self.assertEqual(team["id"], str(self.team.id))
+            self.assertEqual(team["name"], self.team.name)
+
     def test_get_compensation(self):
         """ Tests api GET