DISPATCH-1707: Accept trailing brace on separate line
DISPATCH-1707: Accept trailing brace on separate line

This patch reorganizes the parse accounting for json fields embedded
in a dispatch-config formatted config file. Policy vhost groups hold
doubly-nested maps and those need to be detected and retired as they
come and go.

This closes #811

kgiusti/dispatch,ted-ross/qpid-dispatch,apache/dispatch,kgiusti/dispatch,ChugR/qpid-dispatch,ChugR/qpid-dispatch,apache/qpid-dispatch,ChugR/qpid-dispatch,ErnieAllen/qpid-dispatch,ganeshmurthy/qpid-dispatch,mgoulish/qpid-dispatch,ChugR/qpid-dispatch,ganeshmurthy/qpid-dispatch,mgoulish/qpid-dispatch,ted-ross/qpid-dispatch,apache/dispatch,apache/qpid-dispatch,apache/dispatch,kgiusti/dispatch,ErnieAllen/qpid-dispatch,mgoulish/qpid-dispatch,ted-ross/qpid-dispatch,ted-ross/qpid-dispatch,kgiusti/dispatch,apache/qpid-dispatch,ted-ross/qpid-dispatch,ChugR/qpid-dispatch,apache/dispatch,ganeshmurthy/qpid-dispatch,apache/qpid-dispatch,apache/dispatch,ganeshmurthy/qpid-dispatch,ted-ross/qpid-dispatch,ganeshmurthy/qpid-dispatch,mgoulish/qpid-dispatch,kgiusti/dispatch,apache/dispatch,apache/qpid-dispatch,kgiusti/dispatch,ErnieAllen/qpid-dispatch,mgoulish/qpid-dispatch,ErnieAllen/qpid-dispatch,apache/dispatch,ChugR/qpid-dispatch,mgoulish/qpid-dispatch,ErnieAllen/qpid-dispatch,ganeshmurthy/qpid-dispatch,apache/qpid-dispatch,ErnieAllen/qpid-dispatch