j2k: flatten test cases and testData directory structure

Move j2k/test/tests -> j2k/tests, j2k/test/testData -> j2k/testData

j2k/testData/fileOrElement/class/abstractClassShape.java

@@ -0,0 +1,13 @@
+//class
+abstract class Shape {
+	public String color;
+	public Shape() {
+	}
+	public void setColor(String c) {
+		color = c;
+	}
+	public String getColor() {
+		return color;
+	}
+	public abstract double area();
+}