Add event checkin functionality, seperate power tests into a different form (#536)

* Split power related parts of event checklist into a seperate form

* Revamp H&S overview, remove individual lists.

They were not a good thing.

* Remove old 'vehicle/crew' stuff

* Very initial version of checkin form

* Further work on checkin, add role field etc

* Fix tests after form split

* Add ability to edit checkins, more validation

* Basic checkin/out logic complete

* Add homepage checkin for events happening now

* Minor improvement to homepage UI

* Checkin button turns into checkout button where applicable

* UI work

* Clicking check out does not redirect the user

* Register check in model with the admin site

* Add power record status chip, checklist status chip displays number of checklists

* Minor fixes

* Implement codedoctor suggestions

* pep8

* Add data migration for crew/vehicles

* Checkin only requires login (no perms) and block users from editing other checkins at Django level

RIGS/tests/conftest.py

@@ -43,15 +43,22 @@ def venue(db):
 
 @pytest.fixture  # TODO parameterise with Event sizes
 def checklist(basic_event, venue, admin_user, ra):
-    checklist = models.EventChecklist.objects.create(event=basic_event, power_mic=admin_user, safe_parking=False,
+    checklist = models.EventChecklist.objects.create(event=basic_event, safe_parking=False,
                                                      safe_packing=False, exits=False, trip_hazard=False, warning_signs=False,
                                                      ear_plugs=False, hs_location="Locked away safely",
-                                                     extinguishers_location="Somewhere, I forgot", earthing=False, pat=False,
+                                                     extinguishers_location="Somewhere, I forgot",
                                                      date=timezone.now(), venue=venue)
     yield checklist
     checklist.delete()
 
 
+@pytest.fixture
+def power_test(basic_event, venue, admin_user, ra):
+    power_test = models.PowerTestRecord.objects.create(event=basic_event, venue=venue)
+    yield power_test
+    power_test.delete()
+
+
 @pytest.fixture
 def many_events(db, admin_user, scope="class"):
     many_events = {