DM-7781. Moved the test class to the package matching the main class …

[ymeiymei]

…location.

[lznakano]

The unit test should avoid using other classes if it is possible. I would like to suggest to do the following:

1. The best practice in junit is using setUp() method to initialize some needed variables for testing
2. Then add a tearDown() method to nullify the variable defined in the setUp()
3. Instead of calling

Method m = FitsRead.class.getDeclaredMethod("getZscaleValue", float[].class, ImageHeader.class, RangeValues.class);
m.setAccessible(true);

You can call

Zscale.ZscaleRetval zscaleRetval = new Zscale.ZscaleRetval(...).

Thus, you don't need FitsRead in the picture. If FitsRead has bugs, it will not affect Zscale's unit test.