harvestingkit: Adds orcid extraction

* Adds orcid extraction to elsevier_package.py and jats_utils.py

* Adds according test to elsevier_package_test.py

* Adds jats_utils_test.py with according test

* Changes sample_consyn_record.xml and sample_consyn_output.xml

Signed-off-by: Martin Vesper <martin.vesper@cern.ch>
Merge pull request #94 from mvesper/orcid_addition

harvestingkit: Adds orcid extraction