[475685] Add IconRefreshTests JUnit tests

- IconRefreshTests test on uml::NamedElement.visibility attribute change
the change of icon in diagram.

Bug: 475685
Change-Id: I397728f2b9917bfec299a8ac01e0248a196441af
Signed-off-by: Esteban Dugueperoux <esteban.dugueperoux@obeo.fr>
5 files changed