Add support for blacklist file for Zuul jobs

Currently there is tempest_test_regex that can be used to select or
ignore tests, however when the list is complex it can become complex to
maintain and define. For such complex scenarios is that the blacklist
file exist.

This patch adds support for the blacklist file in Zuul jobs.

Change-Id: Ib63955446ea59d81d0d882704666dcce4a625526
2 files changed