The BindTCP test contained a race condition: if the bind payload took
longer to load than the handler, it could result in a
ConnectException: Connection refused: connect
Work around this by retrying the connection up to 10 times, with 500ms
delay in between.
Downgrad JUnit version since JUnit 4 can only work with -target 1.5 or
higher class files.
Covered are Shell and Meterpreter stage, StreamForwarder, MemoryBuffer,
AESEncryption and Payload (Bind, Reverse, Spawn, AESPassword).
