osd: fix Connection* leak in _send_boot()

This was recently introduced by 9061988ec7eaa922e2b303d9eece86e7c8ee0fa1.
get_local_connection() returns a ConnectionRef; don't leak it!

Signed-off-by: Sage Weil <sage@redhat.com>
osd: fix whitespace

Signed-off-by: Sage Weil <sage@redhat.com>