apt-cache policy mysql-apt-config
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/repo.mysql.com_apt_ubuntu_dists_trusty_mysql-5.7_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.

Grep Results:
grep ^deb /etc/apt/sources.list{,.d/*.list}
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty main restricted
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main restricted
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty universe
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty universe
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates universe
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates universe
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty multiverse
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty multiverse
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
/etc/apt/sources.list:deb http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
/etc/apt/sources.list:deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
/etc/apt/sources.list:deb http://security.ubuntu.com/ubuntu trusty-security main restricted
/etc/apt/sources.list:deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted
/etc/apt/sources.list:deb http://security.ubuntu.com/ubuntu trusty-security universe
/etc/apt/sources.list:deb-src http://security.ubuntu.com/ubuntu trusty-security universe
/etc/apt/sources.list:deb http://security.ubuntu.com/ubuntu trusty-security multiverse
/etc/apt/sources.list:deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse
/etc/apt/sources.list:deb http://extras.ubuntu.com/ubuntu trusty main
/etc/apt/sources.list:deb-src http://extras.ubuntu.com/ubuntu trusty main
/etc/apt/sources.list:deb http://drbl.sourceforge.net/drbl-core drbl stable
/etc/apt/sources.list:deb http://download.webmin.com/download/repository sarge contrib
/etc/apt/sources.list:deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib
/etc/apt/sources.list:deb http://archive.canonical.com/ trusty partner
/etc/apt/sources.list.d/dropbox.list:deb http://linux.dropbox.com/ubuntu/ trusty main
/etc/apt/sources.list.d/mysql.list:deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-apt-config
/etc/apt/sources.list.d/mysql.list:deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-5.7
/etc/apt/sources.list.d/mysql.list:deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-tools
/etc/apt/sources.list.d/mysql.list:deb-src http://repo.mysql.com/apt/ubuntu/ trusty mysql-5.7
/etc/apt/sources.list.d/ubuntu-wine-ppa-trusty.list:deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu trusty main

Changes need in file /ect/apt/sources.list.d/mysql.list to fix this problem:
### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out entries below, but any other modifications may be lost.
# Use command 'dpkg-reconfigure mysql-apt-config' as root for modifications.
#deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-apt-config
#deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-5.7
#deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-tools
#deb http://repo.mysql.com/apt/ubuntu/ trusty mysql-tools-preview
#deb-src http://repo.mysql.com/apt/ubuntu/ trusty mysql-5.7

deb http://repo.mysql.com/apt/ubuntu/ xenial mysql-apt-config
deb http://repo.mysql.com/apt/ubuntu/ xenial mysql-5.7
deb http://repo.mysql.com/apt/ubuntu/ xenial mysql-tools
#deb http://repo.mysql.com/apt/ubuntu/ xenial mysql-tools-preview
deb-src http://repo.mysql.com/apt/ubuntu/ xenial mysql-5.7