Ticket 49789 - By default, do not manage unhashed password
Bug Description:
By default, unhashed#user#password is recorded into changelog database.
It is a specific use when some plugin need to know the clear text password on update.
This should be disabled ('off') by default
Fix Description:
Switch the default value from 'on' to 'off'
https://pagure.io/389-ds-base/issue/49789
Reviewed by: Viktor Ashirov, Simon Pichugi, Mark Reynolds
Platforms tested: F28
Flag Day: no
Doc impact: no