Remove karma from install_mysql

Signed-off-by: Suki <suki@missallsunday.com>
remove karma from install_postgresql

Signed-off-by: Suki <suki@missallsunday.com>
Remove karma from install_sqlite

Signed-off-by: Suki <suki@missallsunday.com>
Remove karma from install_sqlite3

Signed-off-by: Suki <suki@missallsunday.com>
Remove karma columns and settings form the DB on upgrading

Signed-off-by: Suki <suki@missallsunday.com>