INT-3470: Fix SF 4.1 compatibility

JIRA: https://jira.spring.io/browse/INT-3470

According to the commit https://github.com/spring-projects/spring-framework/commit/c06ac06,
the `MessagingException` is now `NestedRuntimeException` including nested StackTrace.
Hence test-cases have to be changed to the `Matchers.containsString` instead of `equals` for the `e.getMessage()`

**Cherry-pick to the 4.0.x**