Remove chained tests in BasicGridTest.cs.

It's good practice to isolate unit tests so their outcome (pass/fail)
does not depend on whether another test has been run/passed/failed. A
method is used to populate the DB independently for each test, and a
TearDown method cleans up the database after each test.

Also adding extra comment in C-style comment test.

OpenSim/Region/ScriptEngine/Shared/CodeTools/Tests/CSCodeGeneratorTest.cs

@@ -376,7 +376,7 @@ default
 */
 default
 {
-    touch_start(integer num_detected) /* this should be stripped */
+    touch_start(integer /* you can't see me! */ num_detected) /* this should be stripped */
     {
         /*
          * fill