MySQL unknown column 'password_last_changed'
From the 5.7.6 release notes:


  If you upgrade to this release of MySQL from an earlier version, you
  must run mysql_upgrade (and restart the server) to incorporate the
  changes to the mysql database. mysql_upgrade moves Password column
  values to the authentication_string column and removes the Password
  column. For nonupgraded installations that have no account_locked
  column, the server treats all accounts as unlocked, and attempts to
  lock or unlock and account produce an error.


Although you will find similar issues in every upgrade, so running this tool is a must. password_last_change was added in 5.7.4, so you must update the table definitions.

Please note that at the time, upgrades from 5.6 are supported, but not from 5.5 at the moment of writing these lines, so if you have upgraded directly from 5.5 or below you will likely find problems.