burp-client: Use burp.p.b name

Using the generic *burp.pyrocufflink.blue* name will allow easier
transition to a new BURP server.  However, since this is not the actual
name, it cannot be used for task delegation, so a separate variable is
required to store the real name of the BURP server.  This is only used
during client deployment, and not by BURP itself.

group_vars/burp-client.yml

@@ -1,2 +1,3 @@
-burp_server: burp0.pyrocufflink.blue
+burp_server: burp.pyrocufflink.blue
 burp_server_cn: burp.pyrocufflink.blue
+burp_server_hostname: burp0.pyrocufflink.blue

roles/burp-client/defaults/main.yml

@@ -1,4 +1,5 @@
 burp_server: localhost
+burp_server_hostname: '{{ burp_server }}'
 burp_password: abcdefgh
 burp_cname: '{{ ansible_fqdn }}'
 burp_backup: []

roles/burp-client/tasks/main.yml

@@ -26,7 +26,7 @@
     owner=burp
     group=burp
     mode=0400
-  delegate_to: '{{ burp_server }}'
+  delegate_to: '{{ burp_server_hostname }}'
 
 - name: ensure burp pre-backup script is installed
   copy: