I20210915-1800
Migrates DialogsTest to JUnit4 Change-Id: I6d90316659e35a05871c73be0cdbccd749e9e281 Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com> Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ui/+/185462 Tested-by: Platform Bot <platform-bot@eclipse.org>