Beah should work when kernel has ipv6.disable=1

Bug: 1062896
handle any combination of IPv6 and IPv4 being enabled

Extracted helper functions for connecting and listening to loopback
using IPv4 or IPv6.

Bug: 1059479
Change-Id: I4ebaa8f520c741e6c3d2412a3ecf52fdd4000ff5
Fix missing conversion for RHTS_PORT env.variable

Change-Id: I5fb8a5ed29f915e23a8f17f2eb65da10b5419d68
Bug: 1063815
Merge changes I4ebaa8f5,I329e78ea into develop

* changes:
  handle any combination of IPv6 and IPv4 being enabled
  Beah should work when kernel has ipv6.disable=1
Automatic commit of package [beah] release [0.7.1-1].