Fix/collected assertion layout check

[TobiasAdler]

Description

The images of a layout check (actual, difference and expected) were wrongly assigned when one or multiple layout checks were performed in one testcase using CONTROL.collectAssertions with the LayoutCheck methods assertScreenshot or assertImage. The wrong linking of the layoutCheckContext and the errorContext could even happen if the layout check itself was passed.

Example:

@Test
public void test_layoutCheck() {
    CONTROL.collectAssertions(() -> {
                LayoutCheck.assertImage(absoluteFile1, "image1", 1.0f);
                LayoutCheck.assertImage(absoluteFile2, "image2", 1.0f);
                LayoutCheck.assertImage(absoluteFile3, "image3", 1.0f);
            }
    );
}

Report:

first assertion: no images
second assertion: images of the first assertion
third assertion: images of the second assertion

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules