Fix tests and missing model after rebase

Author: joefarebrother

java/ql/lib/ext/io.netty.handler.codec.http.model.yml

@@ -10,6 +10,7 @@ extensions:
     extensible: summaryModel
   data:
     - ["io.netty.handler.codec.http", "QueryStringEncoder", True, "QueryStringEncoder", "(String)", "", "Argument[0]", "Argument[this]", "taint", "ai-generated"]
+    - ["io.netty.handler.codec.http", "HttpHeaders", True, "add", "", "", "Argument[this]", "ReturnValue", "value", "manual"]
     - ["io.netty.handler.codec.http", "HttpHeaders", True, "add", "(CharSequence,Iterable)", "", "Argument[0]", "Argument[this].Element.MapKey", "taint", "manual"]
     - ["io.netty.handler.codec.http", "HttpHeaders", True, "add", "(CharSequence,Iterable)", "", "Argument[1].Element", "Argument[this].Element.MapValue", "taint", "manual"]
     - ["io.netty.handler.codec.http", "HttpHeaders", True, "add", "(CharSequence,Object)", "", "Argument[0]", "Argument[this].Element.MapKey", "taint", "manual"]

java/ql/test/library-tests/frameworks/netty/Test.java renamed to java/ql/test/library-tests/frameworks/netty/generated/TestA.java

@@ -4,7 +4,7 @@
 import io.netty.util.concurrent.Future;
 
 // Test case generated by GenerateFlowTestCase.ql
-public class Test {
+public class TestA {
 
 	Object source() {
 		return null;

java/ql/test/library-tests/frameworks/netty/manual/test.ql

@@ -9,3 +9,7 @@ class Conf extends DefaultTaintFlowConf {
     node instanceof RemoteFlowSource
   }
 }
+
+class LegacyConfig extends EnableLegacyConfiguration {
+  LegacyConfig() { this instanceof Unit }
+}