change method of obtaining hostname to match ansible/library/setup

bin/ansible-pull

@@ -40,7 +40,7 @@ import os
 import subprocess
 import sys
 import datetime
-import platform
+import socket
 from optparse import OptionParser
 
 DEFAULT_PLAYBOOK = 'local.yml'
@@ -85,7 +85,7 @@ def main(args):
     if rc != 0:
         return rc
 
-    hostname = "%s.yml" % platform.node()
+    hostname = "%s.yml" % socket.getfqdn()
 
     if not args:
       try: