Refactor taintedString.ql test

Author: egregius313

java/ql/test/query-tests/security/CWE-089/semmle/examples/taintedString.ql

@@ -1,16 +1,16 @@
 import semmle.code.java.dataflow.FlowSources
 
-class Conf extends TaintTracking::Configuration {
-  Conf() { this = "qltest:cwe-089:taintedString" }
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { source instanceof UserInput }
 
-  override predicate isSource(DataFlow::Node source) { source instanceof UserInput }
-
-  override predicate isSink(DataFlow::Node sink) { any() }
+  predicate isSink(DataFlow::Node sink) { any() }
 }
 
-from Conf conf, Expr tainted, Method method
+module Flow = TaintTracking::Global<Config>;
+
+from Expr tainted, Method method
 where
-  conf.hasFlowToExpr(tainted) and
+  Flow::flowToExpr(tainted) and
   tainted.getEnclosingCallable() = method and
   tainted.getFile().getStem() = ["Test", "Validation"]
 select method, tainted.getLocation().getStartLine() - method.getLocation().getStartLine(), tainted