Accept numeric user and group parameters

lib/ansible/module_common.py

@@ -369,6 +369,9 @@ class AnsibleModule(object):
         user, group = self.user_and_group(path)
         if owner != user:
             try:
+                uid = int(owner)
+            except ValueError:
+                try:
                     uid = pwd.getpwnam(owner).pw_uid
                 except KeyError:
                     self.fail_json(path=path, msg='chown failed: failed to look up user %s' % owner)
@@ -390,6 +393,9 @@ class AnsibleModule(object):
             if self.check_mode:
                 return True
             try:
+                gid = int(group)
+            except ValueError:
+                try:
                     gid = grp.getgrnam(group).gr_gid
                 except KeyError:
                     self.fail_json(path=path, msg='chgrp failed: failed to look up group %s' % group)