Tests broken because of changes in pharo core

[demarey]

tests are now broken because Ring2 (https://github.com/guillep/ring2) needs to be updated to do not use anymore package category

[MarcusDenker]

Why is there even Ring2 as an external project, it is already in Pharo (we have both Ring2 and Ring one loaded)

[MarcusDenker]

(and in a very confusing way, the classes have no RG2 prefix so people confuse Ring1 and Ring2 in the system all the time and might not even be aware that here are two RIngs...)

[demarey]

not sure but looks like it is a fork of RIng2 (https://github.com/guillep/ring2).
The fix is as follows:

@sdiepend did the change in https://github.com/sdiepend/Ring2/tree/fix-tests but it cannot be merged in the master branch that evolved.