ctdb-scripts: Set ownership of statd-callout state directory

ctdb-scripts: Set ownership of statd-callout state directory

For add-client and del-client, statd-callout is called by rpc.statd,
which runs as rpcuser, statd or some other non-root system user.  This
means that add-client and del-client can't write in the statd-callout
state directory if it is only writable by root.  rpc.statd must be
able to write to its own local system statd state directory, so find
this directory and use it as a reference to set the ownership of
CTDB's statd-callout state directory.

Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Volker Lendecke <vl@samba.org>