[MCOMPILER-498] Recompilation when class name doesn't match file name

**[T3rm1](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=t3rm1)** opened **[MCOMPILER-498](https://issues.apache.org/jira/browse/MCOMPILER-498?redirect=false)** and commented

The compiler plugin detects a file as stale whenever the class defined inside has a different name than the file.

Steps to reproduce:

Create a file named `SpecialTest.java` in directory `{}foo{`}.
Paste in following content:

```java
package foo;

class UncommonTest {
}

class CommonTest {
}
```

Run `mvn -X test-compile`

It'll report on each invocation: `[DEBUG] Stale source detected: F:\Git\bug\src\test\java\foo\SpecialTest.java`

That's because the plugin is looking for a file `{}SpecialTest.class{`}.

This is a problem because it can easily happen that you have a typo in your class or file name so that they don't match.

---
No further details from [MCOMPILER-498](https://issues.apache.org/jira/browse/MCOMPILER-498?redirect=false)