v2.2.8.RELEASE

Change log:

20b23b7 Upgrade versions; Prepare for Release
fe05179 GH-1215: Allow Abstract Class Deserialization
709a34b GH-1214: Fix NPE When no Container id or Bean name
519a2c9 GH-1207: Fix NPE
48edfb9 GH-1208: Allow SpEL in all @RabbitListener Props
5923d67 Remove unused import for Assume
73e2b20 Fix BrokerRunning for skipping tests