Grab package_ver from remote host

Ansible set_fact sets variables into the hostvars of the host they are
running on. We need to consume the remote hostvar for package_ver in the
context of localhost. So reach in to hostvars.

Set the host to ubuntu-xenial rather than all to be explicit.

Change-Id: I5a5c593cdf80d721a36187e1c552db21f4794b37

playbooks/javascript/post.yaml

@@ -1,4 +1,4 @@
-- hosts: all
+- hosts: ubuntu-xenial
   roles:
     - fetch-javascript-output
     - version-from-git
@@ -6,4 +6,9 @@
 
 - hosts: localhost
   roles:
-    - upload-npm
+    # project_ver is set by set_fact in version-from-git, but that runs on
+    # the remote host, which puts the fact into the hostvars of that host.
+    # Now that we're running on localhost, we need to reach in to the remote
+    # hosts vars to get the value.
+    - role: upload-npm
+      project_ver: "{{ hostvars['ubuntu-xenial']['project_ver'] }}"