Add apt to the runlist on this suite

It will fail due to a missing apt mirror and it needs updating before
attempting to install a few packages.
Updating to the latest patch release of 1.9.3

1.8.7 is officially EOL so it will slowly be removed from the
integration suite.
Update bats tests

This will help better test the system and user based installs of rvm
because it will need sudo access in order to execute any of the rvm
commands as that user for the user installation.