Use DataHandle objects in functor tests

By replacing string locations with DataHandle objects, the associated warnings no longer appear in the functor cache build.

Closes #186 (closed).

/cc @chasse

added Functors ThOr testing labels

approved this merge request

thanks!

/ci-test --merge

added ci-test-triggered label

• [2021-02-19 17:39] Validation started with lhcb-master-mr#1914
• [2021-02-20 00:19] Validation started with lhcb-head#2871
• [2021-02-20 01:25] Validation started with lhcb-head#2871
• [2021-02-21 00:08] Validation started with lhcb-head-2#171

removed ci-test-triggered label

added lhcb-head label

removed lhcb-head label

added lhcb-head-2 label

removed lhcb-head-2 label

assigned to @rmatev and unassigned @frodrigu

resolved all threads

All the tests are good (pipeline, ci-test and nightly).

approved this merge request

unassigned @rmatev

merged

mentioned in commit 8b9b9902