Fix missing search for program components in priority directories

Bug is caused by confusion of level in component sense and level in
path search context, which is not same.
Test searching for programs in Y2DIR (gh#yast/yast-ruby-bindings#107)
simplified the test

avoid a YCP client, create component directly from y2base
Merge branch 'master' into fix_search_servers
version + changelog
made the test work from other directories
folded changelog lines
Merge pull request #82 from yast/fix_search_servers

Fix missing search for program components in priority directories