Removed dependencies on first-boot.d

Moved scripts from first-boot.d to pre-install.d.
Broke bootstrap_init-mysql.sh script into scripts in extra-data.d and post-install.d.
Added /tmp to apparmor.d/local/usr.sbin.mysqld for restoring backups
    (previously, apparmor was being disabled)

Change-Id: I7541c439e2b5465957b823abf95bbfea47a6d65c
Closes-bug: #1212436
Merge "Removed dependencies on first-boot.d"