Fix test discovery by id

src/libexec/jattool-runtest

     #
     debug -v JATS__PATH
     local trypath
+    local tmatches
     for trypath in ${JATS__PATH//:/ }; do
         debug -v trypath
         test -n "$trypath" || continue
         test -d "$trypath" || continue
-        case $(jattool tfind -f ALL "$trypath" | grep -c " $TestId$") in
-            1)  jattool tfind "$trypath"; return 0 ;;
+        tmatches=$(jattool tfind -f ALL "$trypath" | grep "^$TestId	" )
+        case $(wc -l <<<"$tmatches") in
+            1)  cut -d'	' -f3 <<<"$tmatches"; return 0 ;;
             *)  continue ;;
         esac
     done