Fix OFPInstructionWriteMetadata JSON decode

Fix the following:

CLS <class 'ryu.ofproto.ofproto_v1_3_parser.OFPInstructionWriteMetadata'>
ARG {u'metadata_mask': 18446744073709551615L, u'type': 2, u'len': 24, u'metadata': 18446744069414584320L}
KWARG {u'type_': 2, u'metadata_mask': 18446744073709551615L, u'len_': 24, u'metadata': 18446744069414584320L}
Traceback (most recent call last):
  File "a.py", line 19, in <module>
    msg = ofproto_parser.ofp_msg_from_jsondict(dp, m)
  File "/Users/fujita/git/ryu/ryu/ofproto/ofproto_parser.py", line 100, in ofp_msg_from_jsondict
    return cls.from_jsondict(v, datapath=dp)
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 291, in from_jsondict
    kwargs = cls._restore_args(_mapdict_kv(decode, dict_))
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 46, in <lambda>
    _mapdict_kv = lambda f, d: dict([(k, f(k, v)) for k, v in d.items()])
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 290, in <lambda>
    decode = lambda k, x: cls._decode_value(k, x, decode_string)
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 234, in _decode_value
    return cls._get_decoder(k, decode_string)(json_value)
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 242, in _decode
    v = map(_decode, json_value)
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 245, in _decode
    v = cls.obj_from_jsondict(json_value)
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 223, in obj_from_jsondict
    return obj_cls.from_jsondict(v)
  File "/Users/fujita/git/ryu/ryu/lib/stringify.py", line 293, in from_jsondict
    return cls(**dict(kwargs, **additional_args))
TypeError: __init__() got an unexpected keyword argument 'type_'

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofctl.service: fix some crashes

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofctl.service: reduce log level of some messages

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofctl.service: fix a crash on error msg

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

Adds RPC API to manage VRRP.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
doc: update after the sync request change

update documentation after commit c9325a22.
("fix bidirectional event confusion")

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

This includes a small code change; the default value of OFP_VERIONS
was changed to None from the lack of the attribute.  No functional
changes are intended by this.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Make type and len class attributes of OFPInstructionMeter

Make type and len class attributes of OFPInstructionMeter
and update JSON accordingly.

This is in keeping with the implementation of other OFPInstruction classes.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofproto_v1_2_parser: put some assertions

Put some assertions to catch usage mistakes earlier.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofproto_v1_3_parser: put some assertions

Put some assertions to catch usage mistakes earlier.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofproto_v1_2_parser: have a default value for push_vlan ethertype

As this would be 0x8100 in most cases, make it the default.
ofproto_v1_3_parser: have a default value for push_vlan ethertype

As this would be 0x8100 in most cases, make it the default.