Created rspec test for NetworkInterfaces ifcfg device name helpers

Purpose is mainly to cover current state regarding old even new naming
scheme.
Added rspec as BuildRequire
Converted load_ipv6_cfg_test from minitest to rspec.
Updated VERSION
Merge branch 'openSUSE-13_1'

Conflicts:
	VERSION
	library/network/test/network_interfaces_helpers_test.rb
	package/yast2.changes