Initialize quota lists expectedRoots, expectedUsages, and expectedLimits using C++11 syntax.

@dvratil, I didn't like the initial way of initializing lists, but didn't know how to make it more compact. Thanks for pointing this out. I'll update the patch.

I don't think I have commit access. You can use custos.mentis@gmail.com. Thanks!

Patch updated including two autotests.

I am working on autotests. Should I put them in the same patch?

Check if lists are empty using isEmpty() rather than count().

Thanks. Sure, I'll think about some test cases and try to add them to testretrievecollectionmetadatatask.cpp.

Typo in variable declaration.