of1.4: Add table status support

Signed-off-by: Simon Horman <horms@verge.net.au>
packet_data_generator: Update protocol dependency for v5

Update ofproto dependency to include pull request 69,
an implementation of table status

Signed-off-by: Simon Horman <horms@verge.net.au>
of1.4: Add table status unit test

Signed-off-by: Simon Horman <horms@verge.net.au>