QPID-3921: Refactored Broker::Options into its own independent class
- Now called BrokerOptions
- Added extra getters to Broker so that nothing else needs to know
  about BrokerOptions
- Significantly reduces header coupling as lots of files include
  Broker.h, but now don't need Options.h

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1607166 13f79535-47bb-0310-9956-ffa450edef68
QPID-5859: Fix to allow listening to some interfaces to fail
- but still listen to the succeeding ones

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1607167 13f79535-47bb-0310-9956-ffa450edef68