OAK-2077 - Improve the resilence of the OrderedIndex for dangling links

reafactored the test to allow easier extension
OAK-2077 - Improve the resilence of the OrderedIndex for dangling links

extended test to cover all lanes and directions
OAK-2077 - Improve the resilence of the OrderedIndex for dangling links

again refactoring of test code
OAK-2077 - Improve the resilence of the OrderedIndex for dangling links

just formatting