RyuApp: delete a key without handlers when unregistering a handler

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
sw test tool: Add default test files (queue)

These test files aim to examine 'set-queue action' of FlowMod message.

Signed-off-by: WATANABE Fumitaka <watanabe.fumitaka1@gmail.com>
Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>