Add new PostgreSQL schema file
Drop old schema files
Leave it up to the database to decide what is the current time
Fix retrieving a user's data from the database
Fix salt extraction
Do not report whether files were skipped because they already exist

I've removed the summary earlier as a user does not configure this in any
way so it's not necessary to show him what should had happened to files
as well.

refs #7163
Show notification bar in the wizard as well

refs #7163
Add `prefix' option when creating the resource config for web2's database

refs #7163
Fix database setup and add support for the new schema

refs #7163