fix ansible-lint issues in example code

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

examples/eth_with_802_1x.yml

@@ -23,7 +23,7 @@
       copy:
         src: "{{ item }}"
         dest: /etc/pki/tls/{{ item }}
-        mode: 0600
+        mode: "0600"
       with_items:
         - client.key
         - client.pem

examples/macvtap.yml

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 ---
 - name: Manage network MAC VTAP
-  hosts: network-test  
+  hosts: network-test
   vars:
     network_connections:
       - name: eth0