Added tests for {}:exists:(kv|p), fudged for []:exists:(kv|p)
Added tests for {}:exists:(kv|p), fudged for []:exists:(kv|p)

laben/roast,dogbert17/roast,cygx/roast,laben/roast,b2gills/roast,perl6/roast,niner/roast,bitrauser/roast,skids/roast,dogbert17/roast,laben/roast,cygx/roast,niner/roast,dankogai/roast,skids/roast,zostay/roast,zostay/roast,bitrauser/roast,b2gills/roast,zostay/roast,skids/roast,dankogai/roast,cygx/roast,b2gills/roast,dankogai/roast,niner/roast