Remove punctuation in Exception messages

[jxblum]

By default, Java concatenates Exception messages in a chained Exception with the ;. If punctuation is used, then this can lead to confusing text, such as: "Outer exception message.; Chained exception message". Also, the use of the exclamation point (!) is rather abrasive.

Typically, punctuation and other special treatment of the messages in Exceptions is not used. This is also consistent with the core Spring Framework.