Add TupleToolDOCA tool
A tuple tool from the lhcb-slb/SemileptonicCommonTools repo. Added because an analysis requires this (currently private) tool for use in working group productions, so it must be included in the LHCb stack.
I just copied the header and implementation from lhcb-slb/SemileptonicCommonTools@d85711e9, applied the LHCb formatting and license headers, and added a test.
/cc @pseyfert (in particular, note that I removed your copyright from the header file) @egovorko
Edited by Eduardo Rodrigues