fix: supporting single test suite report AM-415/rostests

Author: Aaron Roller

detection.sh

@@ -14,7 +14,7 @@ suite_success(){
     file="$1"
     # look for 0 failures and errors
     # grep reports non zero code if anything but zero failures/errors
-    if cat "$file" | grep "<testsuites";then
+    if cat "$file" | grep "<testsuite";then
         suite_line=$(cat "$file" | grep "<testsuites")
         if echo "$suite_line" | grep "failures=\"0\"";then
             if echo "$suite_line" | grep "errors=\"0\"";then