Thanks for your report.
The relevant error is
---
Setting up phpmyadmin (4:3.2.2.1-1) ...
dbconfig-common: writing config to /etc/dbconfig-common/phpmyadmin.conf
Creating config file /etc/dbconfig-common/phpmyadmin.conf with new
version
Creating config file /etc/phpmyadmin/config-db.php with
** Attachment added: AptOrdering.txt
http://launchpadlibrarian.net/40825861/AptOrdering.txt
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/40825862/Dependencies.txt
** Attachment added: Dmesg.gz
http://launchpadlibrarian.net/40825863/Dmesg.gz
** Attachment added: