Small fixes for hive

[ScottyPoi]

Small fixes for test failures in hive

• Default to [0, 1] as supported versions
• Fix for null input in RPC Ping
  • Expected user behavior is to leave the optional inputs empty, resulting in undefined
  • Hive tests input null for optional params, which was not handled by undefined check
• Update RPC sendOffer results
  • sendOffer output modified to hex string
  • works for both BitArray and ByteArray responses
• Disable congestion control for individual uTP streams
  • "meta" CC exists in requests manager
  • bypass cur_window full error issues