Add container classes to the containers group

core/cont/src/TArray.cxx

core/cont/src/TArrayC.cxx

core/cont/src/TArrayD.cxx

core/cont/src/TArrayF.cxx

core/cont/src/TArrayI.cxx

core/cont/src/TArrayL.cxx

core/cont/src/TArrayL64.cxx

core/cont/src/TArrayS.cxx

core/cont/src/TBits.cxx

core/cont/src/TBtree.cxx

core/cont/src/TClassTable.cxx

core/cont/src/TClonesArray.cxx

core/cont/src/TCollection.cxx

core/cont/src/TExMap.cxx

core/cont/src/THashList.cxx

core/cont/src/THashTable.cxx

core/cont/src/TIterator.cxx

core/cont/src/TList.cxx

core/cont/src/TMap.cxx

core/cont/src/TObjArray.cxx