Bugfix in ceph: size should not be string

Change-Id: I03caaab8600542d2272310344b922c4d21c8aac8
diff --git a/playbooks/roles/post-deployment/vars/main.yml b/playbooks/roles/post-deployment/vars/main.yml
index 1652236..a23321e 100644
--- a/playbooks/roles/post-deployment/vars/main.yml
+++ b/playbooks/roles/post-deployment/vars/main.yml
@@ -25,7 +25,7 @@
 rook_node_device_filter: "vdb"
 
 rook_block_pool_name: "block-pool"
-rook_block_pool_replicas: 3
+rook_block_pool_replicas: 1
 
 rook_block_storage_name: "block-storage"
 rook_block_storage_fs: "xfs"