The release body file that is created by CI should result in text
similar to this:
Source image: jruby:9.2-jdk + OS updates
Gems:
- vmpooler (2.0.0)
- vmpooler-provider-vsphere (1.4.0)
This modifies the update script so that it explicitly runs 'bundle
update' in addition to 'bundle install' and makes the last step to be
printing of the exit code.