Refactor debugger tests

1. Move tests to their own module
2. Avoid sharing the 'tinyApp' project between tests
3. Clean up option directive handling

idea/jvm-debugger/jvm-debugger-test/testData/stepping/stepInto/sameFileNames.kt

@@ -1,3 +1,4 @@
+// FILE: sameFileNames.kt
 package sameFileNames
 
 fun main() {
@@ -5,4 +6,11 @@ fun main() {
     val result = simple.foo()
 }
 
-// STEP_INTO: 1
+// STEP_INTO: 1
+
+// FILE: simple.kt
+package simple
+
+// test more than one file for package in JetPositionManager:prepareTypeMapper. the second file in this package is singleBreakpoint/simple.kt
+fun foo() {
+}