[Enhancement] Swappable Packages (#216)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#216
Reviewed-by: liambrydon <lbry121@aucklanduni.ac.nz>
Reviewed-by: Tobias O <tobias.olenyi@envipath.com>

epdb/admin.py

@@ -1,29 +1,31 @@
+from django.conf import settings as s
 from django.contrib import admin
 
 from .models import (
-    User,
-    UserPackagePermission,
-    Group,
-    GroupPackagePermission,
-    Package,
-    MLRelativeReasoning,
-    EnviFormer,
     Compound,
     CompoundStructure,
-    SimpleAmbitRule,
-    ParallelRule,
-    Reaction,
-    Pathway,
-    Node,
     Edge,
-    Scenario,
-    Setting,
+    EnviFormer,
     ExternalDatabase,
     ExternalIdentifier,
+    Group,
+    GroupPackagePermission,
     JobLog,
     License,
+    MLRelativeReasoning,
+    Node,
+    ParallelRule,
+    Pathway,
+    Reaction,
+    Scenario,
+    Setting,
+    SimpleAmbitRule,
+    User,
+    UserPackagePermission,
 )
 
+Package = s.GET_PACKAGE_MODEL()
+
 
 class UserAdmin(admin.ModelAdmin):
     list_display = ["username", "email", "is_active"]