Consul v1.6.3 and more

• Consul v1.6.3
• consul_manage_group now defaults to true
• Set consul_node_name to ansible_hostname, resolves #337
• Enable consul Connect (thanks @imcitius)
• Cloud auto discovery (thanks @imcitius)
• Use generated password as token UUID source (thanks @jmariondev)
• Fix ACL Replication Token sed pattern (thanks @jmariondev)
• Add when_false to ACL master lookup (thanks @jmariondev)
• Ensure enable_tag_override is json (thanks @slomo)
• Add suport for -alt-domain (thanks @soloradish)
• Add enable_token_persistence option (thanks @smutel)
• Support new ARM builds for Consul 1.6.2+ (thanks @KyleOndy)
• Add CAP_NET_BIND_SERVICE to systemd unit (thanks @smutel)
• Fix configuration template (thanks @imcitius)
• Update documentation (thanks @karras)