Fix auto_tls, and pass travis CI

[noelmcloughlin]

This PR is attempt to fix AUTO TLS and kitchen tests.

Rationale:
Seems we need to remove unsupported ETCD_AUTO_TLS and ETCD_PEER_AUTO_TLS environment variables, and pass as --auto_tls --peer_auto_tls arguments. And etcd developers say we need
--insecure-skip-verify-tls is needed too too to get auto_tls working.

Travis CI
It this PR fixes the issue, then Travis CI kitchen tests should work.

 Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_ADVERTISE_CLIENT_URLS=https://127.0.0.1:2379
Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_DATA_DIR=/var/lib/etcd/etcd0
Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_INITIAL_ADVERTISE_PEER_URLS=https://127.0.0.1:2380
Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_INITIAL_CLUSTER=etcd0=https://127.0.0.1:2380
Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_INITIAL_CLUSTER_STATE=new
Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster-1
 Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_LISTEN_CLIENT_URLS=https://127.0.0.1:2379
Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_LISTEN_PEER_URLS=https://127.0.0.1:2380
 Sep 25 18:43:10 2fcfa892026c etcd[2860]: recognized and used environment variable ETCD_NAME=etcd0
Sep 25 18:43:10 2fcfa892026c etcd[2860]: unrecognized environment variable ETCD_AUTO_TLS=
Sep 25 18:43:10 2fcfa892026c etcd[2860]: unrecognized environment variable ETCD_PEER_AUTO_TLS=

[noelmcloughlin]

Tested successfully on suse. hopefully travis passes

[Service]
User=root
Type=notify

Environment='ETCD_ADVERTISE_CLIENT_URLS=https://127.0.0.1:2379'
Environment='ETCD_DATA_DIR=/var/lib/etcd/etcd0'
Environment='ETCD_INITIAL_ADVERTISE_PEER_URLS=https://127.0.0.1:2380'
Environment='ETCD_INITIAL_CLUSTER=etcd0=https://127.0.0.1:2380'
Environment='ETCD_INITIAL_CLUSTER_STATE=new'
Environment='ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster-1'
Environment='ETCD_LISTEN_CLIENT_URLS=https://127.0.0.1:2379'
Environment='ETCD_LISTEN_PEER_URLS=https://127.0.0.1:2380'
Environment='ETCD_NAME=etcd0'
Environment='ETCDCTL_API=3'
Environment='ETCDCTL_BACKUP_DIR='
Environment='ETCDCTL_CA_FILE='
Environment='ETCDCTL_CERT_FILE='
Environment='ETCDCTL_DATA_DIR='
Environment='ETCDCTL_DISCOVERY_SRV='
Environment='ETCDCTL_ENDPOINT=https://127.0.0.1:2379'
Environment='ETCDCTL_KEY_FILE='
Environment='ETCDCTL_PEERS=https://127.0.0.1:2379'
Environment='ETCDCTL_USERNAME='

ExecStart=/usr/local/coreos/etcd-v3.2.18-linux-amd64/etcd --auto-tls  --peer-auto-tls 
Restart=always
RestartSec=10s
LimitNOFILE=40000
WorkingDirectory=/var/lib/etcd/

[Install]
WantedBy=multi-user.target

---

       ID: etcd-systemd
    Function: module.run
        Name: service.systemctl_reload
      Result: True
     Comment: Module function service.systemctl_reload executed
     Started: 22:49:41.505269
    Duration: 567.384 ms
     Changes:   
              ----------
              ret:
                  True
----------
          ID: etcd_etcd_running
    Function: service.running
        Name: etcd
      Result: True
     Comment: The service etcd is already running
     Started: 22:49:44.216618
    Duration: 188.626 ms
     Changes:   
----------
          ID: etcd_whats_wrong_with_etcd
    Function: cmd.run
        Name: journalctl -xe -u etcd
      Result: True
     Comment: State was not run because onfail req did not change
     Changes: