Merge changes from topic "generic-sockets" into pi-dev

* changes:
  Prevent CTS from hanging if no UDP packet was received
  Switch checkTcp and checkUnconnectedUdp to use generic sockets
  Add generic socket interfaces and functions
  Add GCM to algorithms tested in CTS
tree: 5debd50cf05bafe7e54156ba6ee102b975c4438e
  1. tests/