Fixes: #8998
Apparently some databases don't throw a proper code to identify a `DuplicateKeyException`, so better to catch `DataIntegrityViolationException` with the same meaning.
(cherry picked from commit 676733ccf7)
# Conflicts:
# spring-integration-jdbc/src/main/java/org/springframework/integration/jdbc/metadata/JdbcMetadataStore.java
# spring-integration-jdbc/src/main/java/org/springframework/integration/jdbc/store/JdbcChannelMessageStore.java
306b904d2d