Previously, monit and vector RPMs were embedded directly in the
image-builder-packer repository. This was not ideal because hosting big
binary files in git is always ugly.
This commit brings back monit and vector:
- monit is installed from EPEL
- vector is installed from the upstream RPM repository
Ansible was dropped because we don't need it in the image.
Signed-off-by: Ondřej Budai <ondrej@budai.cz>