Remove auth-fixtures

Since this may lead to errors while initialazing the container.

Closes: #163

fixtures/auth/group.json

-[
-  {
-    "model": "auth.group",
-    "pk": 1,
-    "fields": {
-      "name": "ProgrammmacherInnen",
-      "permissions": []
-    }
-  }
-]

fixtures/auth/group_permissions.json

-[
-  {
-    "model": "auth.group_permissions",
-    "pk": 1,
-    "fields": {
-      "group": 1,
-      "permission": 35
-    }
-  },
-  {
-    "model": "auth.group_permissions",
-    "pk": 2,
-    "fields": {
-      "group": 1,
-      "permission": 28
-    }
-  },
-  {
-    "model": "auth.group_permissions",
-    "pk": 3,
-    "fields": {
-      "group": 1,
-      "permission": 29
-    }
-  },
-  {
-    "model": "auth.group_permissions",
-    "pk": 4,
-    "fields": {
-      "group": 1,
-      "permission": 30
-    }
-  },
-  {
-    "model": "auth.group_permissions",
-    "pk": 5,
-    "fields": {
-      "group": 1,
-      "permission": 8
-    }
-  },
-  {
-    "model": "auth.group_permissions",
-    "pk": 6,
-    "fields": {
-      "group": 1,
-      "permission": 23
-    }
-  }
-]

fixtures/auth/user.json

-[
-  {
-    "model": "auth.user",
-    "pk": 1,
-    "fields": {
-      "password": "pbkdf2_sha256$36000$uMBrNYea7vcc$6599RKSDzRkpoO8lcOjOQI/O1ufPXphIYh10VNqZcYU=",
-      "last_login": null,
-      "is_superuser": true,
-      "username": "admin",
-      "first_name": "",
-      "last_name": "",
-      "email": "",
-      "is_staff": true,
-      "is_active": true,
-      "date_joined": "2017-12-31T22:00:00Z",
-      "groups": [],
-      "user_permissions": []
-    }
-  },
-  {
-    "model": "auth.user",
-    "pk": 2,
-    "fields": {
-      "password": "pbkdf2_sha256$36000$VVSM5LeZfBZM$w0XSHCrucEb7Oj1Qpjdy1SKq5KelpXSPiUXbxh3rWpM=",
-      "last_login": null,
-      "is_superuser": false,
-      "username": "pm1",
-      "first_name": "",
-      "last_name": "",
-      "email": "",
-      "is_staff": true,
-      "is_active": true,
-      "date_joined": "2017-12-31T22:00:00Z",
-      "groups": [],
-      "user_permissions": []
-    }
-  }
-]

fixtures/auth/user_groups.json

-[
-  {
-    "model": "auth.user_groups",
-    "pk": 1,
-    "fields": {
-      "user": 2,
-      "group": 1
-    }
-  }
-]