Add SQLExceptions for Standalone JDBC Server

[svettwer]

As a test designer, I want to be able to specify und which conditions a SQLException should be thrown, to be able to test the behavior of the software in case of an error. In addition, the exceptions should be thrown as an SQLException from the driver implementation.

#3 already implemented the embedded variant. Here is the outcome from that issue concerning the standalone server.

• Merge thenThrow with thenRefuse
• thenRefuse accepts no parameter or a Exception instance
• If the rule states, that the exception should be thrown, the exception is transmitted to the driver and then returned as the cause of an SQLException