* Support swapping default roles
Pseudocode:
```
A. patchRole(role1, default=True):
B. set role1.default = True
for all users:
add role1 to user.roles
C. for role in roles if role != role1:
set role.default = False
for all users:
delete role from user.roles
```
This ensures that changeDescription for the role(s) and user(s) are updated accordingly.
Potential optimization:
Adding role1 and removing role from user.roles could be considered/implemented as one change.
However, increases code complexity.
* Set DataConsumer as default role
* Fix tests
* Fix code smell
