Update tests for new cookie write from headers

Author: joefarebrother

python/ql/lib/semmle/python/Concepts.qll

@@ -1246,9 +1246,7 @@ module Http {
         )
       }
 
-      override DataFlow::Node getNameArg() {
-        result = this.(Http::Server::ResponseHeaderWrite).getValueArg()
-      }
+      override DataFlow::Node getNameArg() { none() }
 
       override DataFlow::Node getHeaderArg() {
         result = this.(Http::Server::ResponseHeaderWrite).getValueArg()

python/ql/test/library-tests/frameworks/flask/response_test.py

@@ -208,7 +208,7 @@ def setting_cookie():  # $requestHandler
     resp = make_response() # $ HttpResponse mimetype=text/html
     resp.set_cookie("key", "value") # $ CookieWrite CookieName="key" CookieValue="value"
     resp.set_cookie(key="key", value="value") # $ CookieWrite CookieName="key" CookieValue="value"
-    resp.headers.add("Set-Cookie", "key2=value2") # $ headerWriteNameUnsanitized="Set-Cookie" headerWriteValue="key2=value2" MISSING: CookieWrite CookieRawHeader="key2=value2"
+    resp.headers.add("Set-Cookie", "key2=value2") # $ headerWriteNameUnsanitized="Set-Cookie" headerWriteValue="key2=value2" CookieWrite CookieRawHeader="key2=value2"
     resp.delete_cookie("key3") # $ CookieWrite CookieName="key3"
     resp.delete_cookie(key="key3") # $ CookieWrite CookieName="key3"
     return resp  # $ SPURIOUS: HttpResponse mimetype=text/html responseBody=resp