ci: add properties for jobs/jjb-deploy.yaml

The 'scm' section also needs to be a list. Jenkins Jobs Builder does not
detect this while validating, but it cause an error while updating the
jobs in Jenkins.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

jobs/jjb-deploy.yaml

@@ -3,6 +3,13 @@
     name: jjb-deploy
     project-type: pipeline
     sandbox: true
+    concurrent: false
+    properties:
+      - github:
+          url: https://github.com/ceph/ceph-csi
+      - build-discarder:
+          days-to-keep: 7
+          artifact-days-to-keep: 7
     dsl: |
       def GIT_REPO = 'http://github.com/ceph/ceph-csi'
       def GIT_BRANCH = 'ci/centos'
@@ -15,7 +22,7 @@
         }
       }
     scm:
-      git:
+      - git:
           name: origin
           url: https://github.com/ceph/ceph-csi
           branches: