Because these tests don't run in the CI, the test did not quite match the
actual code anymore. Apparently a retry mechanism was added after the test was
written.
Adds a new flag which allows users to specify a regexp
which will effectively whitelist certain taints and
allow the test framework to startup tests despite having
tainted nodes.
Fixes an issue where e2e tests were unable to be run
in tainted environments due to the framework waiting for
all the nodes to be schedulable without any tolerations.
