C#: Update taint steps test as the generated models now include a model for the getters for KeyValuePair (we only had manual summaries for the constructor).

Author: michaelnebel

csharp/ql/test/library-tests/csharp7/LocalTaintFlow.expected

@@ -206,7 +206,9 @@
 | CSharp7.cs:283:13:283:62 | SSA def(list) | CSharp7.cs:285:39:285:42 | access to local variable list |
 | CSharp7.cs:283:20:283:62 | call to method Select<KeyValuePair<Int32,String>,(Int32,String)> | CSharp7.cs:283:13:283:62 | SSA def(list) |
 | CSharp7.cs:283:32:283:35 | item | CSharp7.cs:283:41:283:44 | access to parameter item |
+| CSharp7.cs:283:41:283:44 | access to parameter item | CSharp7.cs:283:41:283:48 | access to property Key |
 | CSharp7.cs:283:41:283:44 | access to parameter item | CSharp7.cs:283:51:283:54 | access to parameter item |
+| CSharp7.cs:283:51:283:54 | access to parameter item | CSharp7.cs:283:51:283:60 | access to property Value |
 | CSharp7.cs:285:39:285:42 | access to local variable list | CSharp7.cs:287:36:287:39 | access to local variable list |
 | CSharp7.cs:287:36:287:39 | access to local variable list | CSharp7.cs:289:32:289:35 | access to local variable list |
 | CSharp7.cs:297:18:297:22 | SSA def(x) | CSharp7.cs:297:25:297:25 | SSA phi(x) |