Add stubs & tests

Fix mistakes detected by the tests

Author: atorralba

java/ql/lib/semmle/code/java/frameworks/Logging.qll

@@ -2,6 +2,12 @@ import java
 import semmle.code.java.security.LogInjectionQuery
 import TestUtilities.InlineFlowTest
 
+private class TestSource extends RemoteFlowSource {
+  TestSource() { this.asExpr().(MethodAccess).getMethod().hasName("source") }
+
+  override string getSourceType() { result = "test source" }
+}
+
 private class LogInjectionTest extends InlineFlowTest {
   override DataFlow::Configuration getValueFlowConfig() { none() }
 

java/ql/test/query-tests/security/CWE-117/LogInjectionTest.expected

@@ -0,0 +1 @@
+//semmle-extractor-options: --javac-args -cp ${testdir}/../../../stubs/apache-log4j-1.2.17:${testdir}/../../../stubs/apache-log4j-2.14.1:${testdir}/../../../stubs/apache-commons-logging-1.2:${testdir}/../../../stubs/jboss-logging-3.4.2:${testdir}/../../../stubs/slf4j-2.0.0:${testdir}/../../../stubs/scijava-common-2.87.1:${testdir}/../../../stubs/flogger-0.7.1:${testdir}/../../../stubs/google-android-9.0.0