do not flag dead code if custom JUnit runner is used (IDEA-25444)

java/java-tests/testData/inspection/deadCode/suppress2/expected.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems>  
+</problems>
+

java/java-tests/testData/inspection/deadCode/suppress2/src/A.java

@@ -0,0 +1,8 @@
+class A {
+    @java.lang.SuppressWarnings({"UnusedDeclaration"})
+    A() {
+      B bb = new B();
+    }
+
+}
+

java/java-tests/testData/inspection/deadCode/suppress2/src/B.java

@@ -0,0 +1,3 @@
+class B {
+  
+}