export private members in Internet.ycp

needed in yast2-network testsuite
Merge pull request #445 from lslezak/yast2_export_private

export private members in Internet.ycp
Tv.ycp - export private members to make the testsuite pass
Merge pull request #446 from lslezak/tv_export_private

Tv.ycp - export private members to make the testsuite pass
nis-client - fix agent test
Merge pull request #447 from lslezak/nis-client_testsuite

nis-client - fix agent test