Add JJB template for 300 nodes deployment for Bookin lab

PROD-36488

Change-Id: I4e0bf50ed43ca32b5940cf0d454d9cb8c08bdb2b
diff --git a/jobs/project.yaml b/jobs/project.yaml
index 7aae28c..c2e37a7 100644
--- a/jobs/project.yaml
+++ b/jobs/project.yaml
@@ -22,6 +22,7 @@
       - heat-bm-cicd-queens-contrail-sl
       - bm-e7-cicd-pike-ovs-maas
       - bm-e7-cicd-pike-odl-maas
+      - bm-b300-cicd-queens-ovs-maas
       - released-bm-pike-ovs
       # --- Released envs ------
       - deploy-released: