Add five new qerror strings, they are about listen/connect socket:
  QERR_SOCKET_CONNECT_IN_PROGRESS
  QERR_SOCKET_CONNECT_FAILED
  QERR_SOCKET_LISTEN_FAILED
  QERR_SOCKET_BIND_FAILED
  QERR_SOCKET_CREATE_FAILED
Reviewed-by: NMichael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: NAmos Kong <akong@redhat.com>
Reviewed-by: NOrit Wasserman <owasserm@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>