Add a test for Block::dataArrays() to check if the filter (Type- and NameFilter) work

This will filter for the type and name. Currently the tests is failing:
```
TestBlock.cpp:140: Assertion
Test name: TestBlock::testDataArrayAccess
equality assertion failed
- Expected: 5
- Actual  : 0
```
Maybe I got the test wrong, please check, but I think the actual result is wrong.