Fixed API task file

1. As we have vendor in AV only
2. No more vendor in AC
3. No vendor folder in AR
grab executable from rubygems
Fix order dependent test

see c48cbb02d7e6f585e31b404c0c363f0d6b586811
Back AV description in gemspec
Merge pull request #12173 from arunagw/fixes_reverted_by_revert_commit

Revert fixes