test: add more tests for KDBUS_CMD_CONN_INFO ioctl

We still have to add privileged -> unprivileged KDBUS_CMD_CONN_INFO
ioctl calls.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
connection.c: use krealloc() in kdbus_conn_queue_user_quota()

Signed-off-by: Daniel Mack <daniel@zonque.org>