Hermetic Build integration tests fail when googleapis have proto changes not yet reflected in google-cloud-java or googleapis-gen

Changes in googleapis take a while to reflect in google-cloud-java (owlbot) and googleapis-gen (bazelbot).
Our hermetic build IT builds from the latest commit of googleapis and then compares to google-cloud-java or googleapis-gen, which may be outdated at the moment of running them. 

The only workaround is to wait for the bots atm.