Fix master node taints in multi node installs (#93)

* Taint master nodes if more than one node

* Kick off fork workflow tests

Co-authored-by: Techno Tim <timothystewart6@gmail.com>

inventory/sample/group_vars/all.yml

@@ -22,6 +22,8 @@ k3s_token: "some-SUPER-DEDEUPER-secret-password"
 # it for each of your hosts, though.
 k3s_node_ip: '{{ ansible_facts[flannel_iface]["ipv4"]["address"] }}'
 
+k3s_single_node: "{{ 'true' if groups['k3s_cluster'] | length == 1 else 'false' }}"
+
 # these arguments are recommended for servers as well as agents:
 extra_args: >-
   --flannel-iface={{ flannel_iface }}