Comment 3 for bug 1574168

From log:

Setting up mysql-server-5.7 (5.7.11-0ubuntu6) ...
Installing new version of config file /etc/apparmor.d/usr.sbin.mysqld ...
Installing new version of config file /etc/init.d/mysql ...
Installing new version of config file /etc/init/mysql.conf ...
Installing new version of config file /etc/logrotate.d/mysql-server ...
Installing new version of config file /etc/mysql/debian-start ...
update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode
insserv: warning: script 'K01nuclos.nuclos' missing LSB tags and overrides
insserv: warning: script 'K01postgresql-9.3' missing LSB tags and overrides
insserv: warning: script 'nuclos.nuclos' missing LSB tags and overrides
insserv: warning: script 'postgresql-9.3' missing LSB tags and overrides
mysql start/running, process 17027
Checking if update is needed.
Checking server version.
Running queries to upgrade MySQL server.
mysql_upgrade: [ERROR] 1007: Can't create database 'performance_schema'; database exists
mysql_upgrade failed with exit status 5
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured