Description of problem:
Exchange argument 'qpid.sequence_counter' is ignored

// Documentation CITE:
qpid.msg_sequence (bool)
If set to “true”, the exchange inserts a sequence number named “qpid.msg_sequence” into the message headers of each message. The type of this sequence number is int64. The sequence number for the first message routed from the exchange is 1, it is incremented sequentially for each subsequent message. The sequence number is reset to 1 when the qpid broker is restarted.
qpid.sequence_counter (int64)
Start qpid.msg_sequence counting at the given number.
// END CITE

Version-Release number of selected component (if applicable):
qpid-cpp-*-0.22-29
qpid-cpp-*-0.18-18

How reproducible:
100%

Steps to Reproduce:
1. create exchange with 'qpid.msg_sequence:True' & 'qpid.sequence_counter:10
and listen for messages
./qc2_drain -f "xx;{create:always, node:{type:topic, x-declare:{arguments:{'qpid.msg_sequence':True, 'qpid.sequence_counter':10}}, durable:true}}"

2. check the QMF
./qmf2_list_objects --query-data exchange/xx | ipython
  ## see additional info for results

4. ./qc2_spout "xx"

Actual results:
{'redelivered': False, 'reply-to': None, 'subject': None, 'content_type': None, 'id': None, 'user_id': None, 'correlation_id': None, 'priority': None, 'durable': False, 'ttl': 0, 'properties': {

  'qpid.msg_sequence': 1, 

'spout-id': 'bdc6ce42-6129-4aa0-b2a4-2715c6a5f7de:0', 'x-amqp-0-10.routing-key': None}, 'content': None}

Expected results:
{'redelivered': False, 'reply-to': None, 'subject': None, 'content_type': None, 'id': None, 'user_id': None, 'correlation_id': None, 'priority': None, 'durable': False, 'ttl': 0, 'properties': {

  'qpid.msg_sequence': 10, 

'spout-id': 'bdc6ce42-6129-4aa0-b2a4-2715c6a5f7de:0', 'x-amqp-0-10.routing-key': None}, 'content': None}

Additional info:

QMF listing of xx exchange, see the arguments are correctly set

{'_create_ts': 1386773891936297051,
 '_delete_ts': 0,
 '_object_id': {'_object_name': 'org.apache.qpid.broker:exchange:xx'},
 '_schema_id': {'_class_name': 'exchange',
                '_hash': 'c9bb43df-44ac-63d5-cc1c-6a032025c97d',
                '_package_name': 'org.apache.qpid.broker',
                '_type': '_data'},
 '_update_ts': 1386773894113967633,
 'arguments': {'qpid.msg_sequence': True, 'qpid.sequence_counter': 10},
 'autoDelete': False,
 'bindingCount': 1,
 'bindingCountHigh': 1,
 'bindingCountLow': 1,
 'byteDrops': 0,
 'byteReceives': 0,
 'byteRoutes': 0,
 'durable': True,
 'msgDrops': 0,
 'msgReceives': 0,
 'msgRoutes': 0,
 'name': 'xx',
 'producerCount': 0,
 'producerCountHigh': 0,
 'producerCountLow': 0,
 'type': 'topic',
 'vhostRef': {'_object_name': 'org.apache.qpid.broker:vhost:org.apache.qpid.broker:broker:amqp-broker,/'}}