CORD-1151
Make cord_dir and cord_profile_dir local to config node
use head_* and config_* prefixes to avoid hardcoding paths
config-side ssh key generation+
fix frontend & mock builds
[build] group in inventory
fix inventory strangeness
raise privs when creating ssh_pki_dir
move admin-openrc.sh.j2 to cord-profile
add copy-cord-playbook.yml, clarify where it runs
fix paths for head_cord_profile_dir with mock/frontend
use /opt/cord_profile/admin-openrc.sh rather than ~/admin-openrc.sh
install pki
make comment in do-enlist-compute-node accurate, set correct interface
remove hardcoded credential path
logging and ssh key fixes

Change-Id: Ie7560c911dce1558e09806c9997884dfbd475e9c
diff --git a/build-platform-install-playbook.yml b/build-platform-install-playbook.yml
index 8466693..358e300 100644
--- a/build-platform-install-playbook.yml
+++ b/build-platform-install-playbook.yml
@@ -2,7 +2,7 @@
 # build-platform-install-playbook.yml
 
 - name: Include vars
-  hosts: localhost
+  hosts: build
   tasks:
     - name: Include variables
       include_vars: "{{ item }}"
@@ -11,8 +11,7 @@
         - profile_manifests/local_vars.yml
 
 - name: Build the core image
-  hosts: localhost
+  hosts: build
   roles:
     - xos-core-build
 
-