Create API calls to Manage Blacklisted Domains

Add all API calls to manage blacklisted domains via a database.
Also, change the code to use the blacklisted domains from
the database and not from the config file.

bp/blacklist

Change-Id: I0fa08652cc0f15ab57708cd28413c43200e6d802
Merge "Create API calls to Manage Blacklisted Domains"