Fix incorrect trigger phrase and add keep jobs to
project-infra repository.

Change-Id: I0defbd92ac786e891bfddd2b4f035bf2db0eca57
diff --git a/jjb/airship/projects.yml b/jjb/airship/projects.yml
index 19a6fd0..d65200f 100644
--- a/jjb/airship/projects.yml
+++ b/jjb/airship/projects.yml
@@ -68,6 +68,10 @@
     - feature_tests_centos
     - feature_tests_upgrade_ubuntu
     - bml_integration_tests_centos
+    - keep_v1b1_test_ubuntu_alive
+    - keep_v1b1_test_centos_alive
+    - keep_v1a5_test_ubuntu_alive
+    - keep_v1a5_test_centos_alive
 
 - project:
     name: 'metal3io_project_infra_cleanup'