Fixed PZP revocation and removal

Bug fixes only.

Jira issue: WP-773
Clean up comments

Jira issue: WP-773
Test fix - add nickname to user object.

Jira issue: WP-773
Second fix for testing: add nickname to addPzh().

Jira issue: WP-773
Fix tests

Jira issue: WP-773
Merge pull request #20 from jplyle/fix-revocation-again

Fix revocation again