fixed logging error on server launch when no firewall specified
backport bug fixes

do not return from delete volume method until op has either passed or
failed.
stop server before modify operations if it is running.
throw OperationNotSupportedException for RuleTargetType.GLOBAL
ensure server is stopped before moving on to next op
Merge pull request #14 from daniellemayne/2013.02

bugzid 3251: allow volume attach on running server, also backported bug fixes found during 2013.07 testing