Image build not executing in ovb check jobs for projects which affect the image building itself.

[Sandeep Yadav]

Description:

"check-to-build-or-not-to-build" role decides whether we need to build images or not, default_projects_need_build_list contains list of repos can affect the image building itelf.

tripleo-image-elements is one of the project that affect image build itself and is present in "default_projects_need_build_list"[1]

But recently in one of patch in tripleo-image-elements[2] we noticed image build didn't execute, logs[3]

We are writing this bug to investigate why image build didn't occur against tripleo-image-elements patch and fix this.

[1] https://github.com/openstack/tripleo-quickstart-extras/blob/1353686ddfbdedfb8578dc5183d2dd0216d87e2f/roles/check-to-build-or-not-to-build/defaults/main.yml#L2-L9
[2] https://review.opendev.org/c/openstack/tripleo-image-elements/+/791766
[3] https://logserver.rdoproject.org/66/791766/1/openstack-check/tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset001/1bf5f8f/job-output.txt

[Ronelle Landy (rlandy)]

https://review.rdoproject.org/r/c/rdo-jobs/+/33861 should fix this.
Removes the to_build: false on check jobs.