Fix for OVPMS-1494 Change ESCI inbox processing to skip inboxes that cannot be contacted

git-svn-id: svn://svn.openvpms.org/openvpms/esci-adapter/trunk@6308 9e4fa352-aafb-0310-9071-df624684024b
Merge from trunk fix for OVPMS-1494 Change ESCI inbox processing to skip inboxes that cannot be contacted

git-svn-id: svn://svn.openvpms.org/openvpms/esci-adapter/branches/1.8-dev@6309 9e4fa352-aafb-0310-9071-df624684024b