Consolidate server templates into a single one (#443)

- Fix linting to achieve production level for k3s-server role

Signed-off-by: Derek Nola <derek.nola@suse.com>

roles/k3s_server/templates/k3s.service.j2

@@ -0,0 +1,31 @@
+[Unit]
+Description=Lightweight Kubernetes
+Documentation=https://k3s.io
+Wants=network-online.target
+After=network-online.target
+
+[Install]
+WantedBy=multi-user.target
+
+[Service]
+Type=notify
+EnvironmentFile=-/etc/default/%N
+EnvironmentFile=-/etc/sysconfig/%N
+EnvironmentFile=-/etc/systemd/system/k3s.service.env
+KillMode=process
+Delegate=yes
+# Having non-zero Limit*s causes performance problems due to accounting overhead
+# in the kernel. We recommend using cgroups to do container-local accounting.
+LimitNOFILE=1048576
+LimitNPROC=infinity
+LimitCORE=infinity
+TasksMax=infinity
+TimeoutStartSec=0
+Restart=always
+RestartSec=5s
+ExecStartPre=-/sbin/modprobe br_netfilter
+ExecStartPre=-/sbin/modprobe overlay
+ExecStart=/usr/local/bin/k3s server --data-dir {{ k3s_server_location }} {% if cluster_init == true %}--cluster-init {% endif %} \
+    {% if join == true %}--server https://{{ api_endpoint }}:{{ api_port }} {% endif %} \
+    {{ opt_tls_san }} \
+    {{ extra_server_args }}