server: benchmark: Refactor error handling to use BenchmarkUncaughtExceptionHandler

Refactor error handling to use BenchmarkUncaughtExceptionHandler in cases where the
occurence of an error should terminate the benchmark tool as soon as possible.
* remove explicit error handling for performIO() (AbstractBenchmark)
* remove explicit error handling for client creation (BenchmarkClientFactory)
* remove explicit error handling for getting the MRC Adress (Params)
* remove explicit error handling for creating the directory structure (VolumeManager)
* improve error handling in run() (BenchThread)
* improve error handling in tryConnection() (Controller)