Add consistency between deploy-secrets and installer

The installer creates the application in the following path:
home_dir: "/home/{{{ deploy_user }}"

We update the variable "deploy_to" in the deploy-secrets
file to be consistent with the installer.

While we are modifying the file we also update the "user"
variable in staging and preproduction sections with the
installer default value: "deploy_user: deploy" the same as
we already have in the production section.

config/deploy-secrets.yml.example

@@ -1,18 +1,18 @@
 staging:
-  deploy_to: "/var/www/consul"
+  deploy_to: "/home/deploy/consul"
   ssh_port: "21"
   server: "staging.consul.es"
-  user: "xxxxx"
+  user: "deploy"
 
 preproduction:
-  deploy_to: "/var/www/consul"
+  deploy_to: "/home/deploy/consul"
   ssh_port: "2222"
   server1: xxx.xxx.xxx.xxx
   server2: xxx.xxx.xxx.xxx
-  user: xxxxx
+  user: "deploy"
 
 production:
-  deploy_to: "/var/www/consul"
+  deploy_to: "/home/deploy/consul"
   ssh_port: "22"
   server1: xxx.xxx.xxx.xxx
   server2: xxx.xxx.xxx.xxx