Add cyborg-tempest-plugin to required-projects and remove octavia

This commit adds opendev.org/openstack/cyborg-tempest-plugin to
required-projects to pass the plugin-sanity-check job. It's a new
tempest plugin. It doesn't work properly on master yet. So, I put it on
the BLACKLIST.

And this commit also removes octavia because octavia tempest tests were
already migrated to octavia-tempest-plugin, and there is no tempest test
in the octavia repo. The removal patch[0] in octavia was already merged.

[0] https://review.opendev.org/#/c/659516/

Change-Id: Ied13dbf774472e1c36dca4ccca157104a81fbf9d
diff --git a/tools/tempest-plugin-sanity.sh b/tools/tempest-plugin-sanity.sh
index 500ff02..6bb87c5 100644
--- a/tools/tempest-plugin-sanity.sh
+++ b/tools/tempest-plugin-sanity.sh
@@ -47,6 +47,7 @@
 # (6 months or more)
 # TODO(masayukig): Some of these can be removed from BLACKLIST in the future.
 # barbican-tempest-plugin: https://review.openstack.org/#/c/634631/
+# cyborg-tempest-plugin: https://review.opendev.org/659687
 # intel-nfv-ci-tests: https://review.openstack.org/#/c/634640/
 # networking-ansible: https://review.openstack.org/#/c/634647/
 # networking-generic-switch: https://review.openstack.org/#/c/634846/
@@ -61,6 +62,7 @@
 # vitrage-tempest-plugin: https://review.openstack.org/#/c/639003/
 BLACKLIST="
 barbican-tempest-plugin
+cyborg-tempest-plugin
 intel-nfv-ci-tests
 networking-ansible
 networking-generic-switch