This ticket uses and tests the "Use static inner class" cleanup feature:
 - It reviews the feature
 - It reduces the memory consumption as it avoids the pointer to the
outer class

Example:

Before:

public class Outer {

public class InnerClass {
    int i;

    public boolean anotherMethod() {
        return true;
    }
}
}

After:

public class Outer {

public static class InnerClass {
    int i;

    public boolean anotherMethod() {
        return true;
    }
}
}

Change-Id: I057d06e332ab147a3cbc9d3ba0e4577164301079
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>