Micro AI scenario files: add wmllint unbalanced-on/off comments

These are needed because wmllint gets confused by tags inside message
texts as well as by code that looks like tags, such as the path= keys
in [modify_ai] tags.


git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56443 75b3775d-3801-0410-9e12-e2e43121521d