ofproto_v1_4: Add tun_ipv4_src and tun_ipv4_dst NXMs

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
sw test tool: Fix typos

Reported by Ian Y. Choi on ryu-devel.

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Add a simple switch for Openflow 1.4, an easy adaption of SimpleSwitch13

Signed-off-by: Shu Shen <shu.shen@radisys.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
simple_switch_13: Update a comment about OVS bug

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
simple_switch_14: Update a comment about OVS bug

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>