mon: ceph-monstore-tool must close()

Otherwise it asserts because the destructor checks for the is_open flag.

http://tracker.ceph.com/issues/10093 Fixes: #10093

Signed-off-by: Loic Dachary <ldachary@redhat.com>

src/tools/ceph_monstore_tool.cc

@@ -405,6 +405,7 @@ int main(int argc, char **argv) {
   }
 
   done:
+  st.close();
   if (vm.count("out") && fd > 0) {
     ::close(fd);
   }