v2.8.0-M2

Change log:

3a1e857 Upgrade versions; prepare for 2.8.0-M2
9924210 GH-1827: Fix Race
852c447 GH-1879: Factories Now Configure (De)Serializers
523fa05 GH-1900: Fix Parameter Type for Previous Commit
acd09de GH-1900: Add @nullable to setters for the corresponding nullable getters.
9e199fb Add Newlines When Logging Container Config
bcf8fdb Fix Race in Test
d1a5437 Fix Sonar Issues
97ac358 GH-1827: ContainerGroupSequencerTests Diagnostics
56021ab Suppress Sonar Issues
6ecafd9 GH-1898: Fix OOM in LoggingProducerListener
b79994f Improve Decorated ListenerExecutionFailedException
3ae1aea GH-1882 DLPR: Add Exception Cause Header
6e5d4b9 GH-1872: @KafkaListener Override Listener Type
a6616ba GH-1894: DLPR: Fix Headers with Only Key Exception
9ad308d GH-615: Complete CommonErrorHandler Work
50196bf GH-615: More CommonErrorHandlers
b53bb33 GH-1880: Fix Unused Import
3676502 GH-1880: SpEL Improvements for Property Overrides
c9d0b48 GH-1888: Revert Deprec. setTransactionDefinition()
7af2a1c GH-1886: Deprecate RetryTemplate
c43a265 GH-1883: Fix replyTimeout Logic
e20c2ec Make JacksonUtils compatible with Native
8fa4c60 GH-615: Fix new Sonar Issue
a35a6c5 GH-1876: Fix new Sonar Issues
3b06529 GH-615: Add DefaultErrorHandler
24ff85d GH-1876: Seek To Timestamp with Manual Assignment
3fb3bb8 Documentation: fixup example for sending a message (#1874)