Make process number configurable #351

Job	Run time
call-build-workflow / Build openstack-operator image using buildah	1m 56s
call-build-workflow / Build openstack-operator image using buildah	1m 56s
call-build-workflow / Build openstack-operator image using buildah	1m 56s
call-build-workflow / Build openstack-operator image using buildah	1m 56s
call-build-workflow / openstack-operator-bundle	3m 44s
call-build-workflow / openstack-operator-bundle	3m 44s
call-build-workflow / openstack-operator-bundle	3m 44s
call-build-workflow / openstack-operator-bundle	3m 44s
call-build-workflow / operator-index	19s
call-build-workflow / operator-index	21s
call-build-workflow / operator-index	23s
call-build-workflow / operator-index	12s
	23m 55s

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