Sync RPC module from Oslo

Sync RPC module from Oslo

22e971a safe_log Sanitize Passwords in List of Dicts
8b2b0b7 Use hacking import_exceptions for gettextutils._
23f6029 Use six.seraise() instead of `raise exc, val, tb`
6d0a6c3 Correct invalid docstrings
7cac1ac Fix mis-spellings
ef406a2* Create a shared queue for QPID topic consumers
e6494c2 Use six.iteritems to make dict work on Python2/3
e227c0e* Properly reconnect subscribing clients when QPID broker restarts
16fb43b Replace data structures' attribute with six module
27b21bc Unify different names between Python2/3 with six.moves
12bcdb7 Remove vim header
3970d46 Fix typos in oslo
1771a77 Adjust import order according to PEP8 imports rule
0717d1d matchmaker_redis compatibility with redis-py 2.4
f88d59a Drop RPC securemessage.py
39f6589 Use localisation
8a3996a Fix missing space in help text
4bfb7a2 Apply six for metaclass
d7d74a7 Add `versionutils` for version compatibility checks
3cdd157 Add third element to RPC versions for backports
76972e2* Support a new qpid topology
284b13a Raise timeout in fake RPC if no consumers found
9721129 exception: remove
7b0cb37 Don't eat callback exceptions
69abf38 requeue instead of reject
28395d9 Fixes files with wrong bitmode
bec54ac Fix case error in qpid exchange type "direct"
61c4cde Ensure context type is handled when using to_dict
223f9e1 Clarify precedence of secret_key_file
a035f95 Don't shadow cfg import in securemessage
0f88575 Remove redundant global keyword in securemessage
848c4d5 Some nitpicky securemessage cleanups
5c71c25 Allow non-use of cfg.CONF in securemessage
9157286 RPC: Add MessageSecurity implementation
2031e60 Refactors boolean returns
a047a35 Make ZeroMQ based RPC consumer threads more robust
34a6842 On reconnecting a FanoutConsumer, don't grow the topic name
f52446c Add serializer param to RPC service
5ff534d Add config for amqp durable/auto_delete queues
f9f1b4f Revert "Add support for heartbeating in the kombu RPC driver"
1a2df89 Enable H302 hacking check
7bfd443 Avoid shadowing Exception 'message' attribute
99b7c35 Convert kombu SSL version string into integer
c37f6aa Add support for heartbeating in the kombu RPC driver
3006787 Sanitize passwords in _safe_log
dea334a Replace sys.exit by a RPCException
3969355 Fix exception arg typo
22ec8ff Make AMQP based RPC consumer threads more robust
13650b1 rpc: remove some unused serialization code
e204885 Optionally reject messages on exception.
688832f Remove unused zmq relay functionality
719eba4 Don't reconnect to exclusive fanout consumers.
980fe5f Allow exceptions to hop up cells
80476f0 Add can_send_version() to RpcProxy.
7119e29 Enable hacking H404 test.
32e2a25 zmq: remove someone unused code from ZmqClient
6d42ced Remove the amqp_rpc_single_reply_queue option from Havana
7ce5441 Fix problem with long messages in Qpid
e3545f8 Enable hacking H402 test
15d8d69 Silence exceptions from qpid connection.close()
484a1df Enable hacking H403 test
35660da Enable hacking H401 test
1a9a744 MatchMakerStub - make it work & add test
35aad91 Use zero-copy in ZeroMQ proxy (zmq-rpc-receiver)
b677b13 Remove rootwrap from IPC directory creation
93ee6e3 Add generic serialization support
fe2f108 Enable hacking H702 localization test
0a14e1d Enable hacking H703: Multiple positional placeholders
df7ea83 Allow RPC_API_NAMESPACE on RpcProxy objects
aa89d8b Support capping message versions in the client.
1d7920a Extract matchmaker_ring to own module
3e33692 Merge "Removes len() on empty sequence evaluation"
44c79fc Merge "python3: use 'as' syntax for exception assignment"
0c54b72 python3: use 'as' syntax for exception assignment
a514693 Removes len() on empty sequence evaluation
fde1e15 Convert unicode for python3 portability
0c9047c* Ensure that qpid connection is closed.
120ddef Improve Python 3.x compatibility

(* after hash indicates this was already ported to Cinder)

Oslo version:
7a51572 Merge "Implement cache abstraction layer"
Date:   Wed Jan 15 19:31:16 2014 +0000

Related-Bug: #1189711
Closes-Bug: #1270178

Change-Id: I19572c5e98c1c1037a6a622d63fbdea8d6001532