Fix for Zuul gate with test-site deployment

* cephcluster fails to bring up 3 mons with 2 nodes
* reducing the mon count to 1 for test-site
Error: "start 3 mons on 2 node(s) when allowMultiplePerNode is false"

Change-Id: I140252692c10307eb40f68d5fd18cafeb696cfa2

manifests/site/test-site/target/catalogues/storage.yaml

@@ -32,4 +32,6 @@ spec:
         devicePathFilter: "^/dev/disk/by-path/pci-0000:18:00.0-scsi-0:2:[3-8]:0"
         # Or you can use device filter
         # deviceFilter: "^/dev/sd[d-k]"
+  mon:
+    count: 1
 ---

manifests/site/test-site/target/workload/replacements/ceph-nodes.yaml

@@ -19,3 +19,13 @@ replacements:
       kind: CephCluster
       name: ceph
     fieldrefs: ["{.spec.storage}"]
+- source:
+    objref:
+      kind: StorageCatalogue
+      name: storage
+    fieldref: "{.spec.mon.count}"
+  target:
+    objref:
+      kind: CephCluster
+      name: ceph
+    fieldrefs: ["{.spec.mon.count}"]