C#: Fix changed qltest.

Author: calumgrant

csharp/ql/test/library-tests/conversion/operator/Operator.ql

@@ -12,5 +12,6 @@ where
    */
 
   s2 != "FormatParam" and
-  s2 != "StringOrCharArray"
+  s2 != "StringOrCharArray" and
+  s2 != "EventSourceActivity"
 select s1, s2 order by s1, s2

csharp/ql/test/library-tests/expressions/StripCasts.expected

@@ -47,6 +47,7 @@
 | expressions.cs:168:42:168:42 | (...) ... | expressions.cs:168:42:168:42 | access to parameter i |
 | expressions.cs:312:17:312:21 | (...) ... | expressions.cs:312:17:312:21 | access to parameter value |
 | expressions.cs:312:30:312:34 | (...) ... | expressions.cs:312:30:312:34 | access to parameter value |
+| expressions.cs:334:30:334:30 | (...) ... | expressions.cs:334:30:334:30 | 8 |
 | expressions.cs:414:31:414:31 | (...) ... | expressions.cs:414:31:414:31 | 1 |
 | expressions.cs:414:39:414:39 | (...) ... | expressions.cs:414:39:414:39 | 2 |
 | expressions.cs:437:41:437:53 | (...) ... | expressions.cs:437:48:437:52 | ... + ... |