Remove duplicate GRUB configuration

    The diskimage-builder now contains the GRUB configuration

    Removing extra (unnecessary) packages from base-apps

    Locking-in version on libmysql18 so that it works with mysql and percona

Change-Id: I81beafe0b9d6b563f07611ffcf01eefc8a28fb4c
Fixes: bug #1103665
Merge "Remove duplicate GRUB configuration"