* Alter fixture to test objects in public schema
Properly erase and restore the public schema -- requires permissions to install pgcrypto each time.
* Test for fks through public schema tables
* Thanks @fab1an
also fix broken text env
After the last couple of commits the tests ran correctly only on a
fresh db, in addition, the roles within the db were not created/dropped
on each request and we need that since their privileges differ and we
need to to have an absolute clean db on each execution
