Switch from netcat to netcat-openbsd package

The netcat package is a transitional package on focal and jammy and
ultimately installs netcat-openbsd on those platforms. On Noble the
transitional package is gone and we need to install either
netcat-openbsd or netcat-traditional. Choose netcat-openbsd since that
seems to be what we get by default on the older platforms in order to
support deploying on Noble as well as Focal/Jammy.

This is particularly useful for the updated zookeeper server
deployments.

Change-Id: I188acace3284b1f79cc0be9f20e4067cc924f5c2

playbooks/roles/graphite/tasks/main.yaml

@@ -61,7 +61,7 @@
 - name: Install netcat
   package:
     name:
-      - netcat
+      - netcat-openbsd
       - python3-whisper
     state: present
 

playbooks/roles/zookeeper/tasks/main.yaml

@@ -60,5 +60,5 @@
 # commands.
 - name: Install netcat
   package:
-    name: netcat
+    name: netcat-openbsd
     state: present