Exception in ReadListener.onDataAvailable() may cause infinite loop

If an exception comes out of ReadListener.onDataAvailable() before the input stream is fully read, Undertow calls onDataAvailable() repeatedly.

If e.g. the connection is closed prematurely this may lead into an infinite loop.

https://github.com/mkouba/wildfly/commit/702cfefdd96ffd5c7debdce8b3e65a9daadfaeac#diff-42a628182001385ff40dc34acd258289R49