use assert_select instead of assert_tag in Mercurial annotate test (#14931)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12140 e93f8b46-1217-0410-a6f0-8f06a7374b81
use assert_select instead of assert_tag in Bazaar annotate test (#14931)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12141 e93f8b46-1217-0410-a6f0-8f06a7374b81