03-reset-bls-entries was previously a pre-install script to run after
the machine-id was set, but a new kernel may be installed during the
install phase, which will install another bls entry file with a
filename which differs from the machine-id.
This means this package installed bls file won't be updated when
grub2-mkconfig is called, resulting in incorrect kernel args and boot
device in the entry file that will get booted by default.
By fixing the filenames after the new kernel is installed,
grub2-mkconfig will update the bls file that actually gets used on
boot.
Change-Id: I653bef9638e38ded68458fd40d90e30e5206caad
e129fad7f8