[java] better sanitizing for Java module names (IDEA-168799)

java/java-tests/testSrc/com/intellij/ide/actions/CreateModuleInfoActionTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2016 JetBrains s.r.o.
+ * Copyright 2000-2017 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,7 +41,7 @@ class CreateModuleInfoActionTest : LightJava9ModulesCodeInsightFixtureTestCase()
         /**
          * Created by ${p["USER"]} on ${p["DATE"]}.
          */
-        module light_idea_test_case {
+        module light.idea.test.case {
         }""".trimIndent(), file.text)
   }