Fix int overflow in TraceCollector.hash()

[IlyaMuravjov]

Java interprets (int) x % capacity as ((int) x) % capacity. Therefore, whenever 33-rd bit of x is 1, then ((int) x) is negative and hence (int) x % capacity is also negative and can't be used as an array index.

In the current implementation 5-th byte of key stores the lower byte of the methodId: Long, meaning that for classes with over 128 methods 33-rd bit of key can be 1, which ultimately causes jcInstructionCovered() to fail with IndexOutOfBoundsException.