Fix words and phrases annotation bugs

.gitlab-ci.yml

requirements-test.txt

src/libmwereader/mwereader.cpp

src/tests/docker/Dockerfile

src/tests/python-tests/__init__.py

src/tests/python-tests/ccl_ann_test.py

src/tests/python-tests/test_wccl.py

src/tests/python-tests/testdata/doc_01.xml

src/tests/python-tests/testdata/doc_01_annotated.xml

src/tests/python-tests/testdata/doc_02.xml

src/tests/python-tests/testdata/doc_03.xml

src/tests/python-tests/testdata/doc_03b.xml

src/tests/python-tests/testdata/doc_03c.xml

src/tests/python-tests/testdata/doc_03d.xml

src/tests/python-tests/testdata/doc_03e.xml

src/tests/python-tests/testdata/wccl_dict_01.xml

src/tests/python-tests/testdata/wccl_dict_02.xml

src/tests/python-tests/testdata/wccl_dict_03.xml

src/tests/python-tests/testdata/wccl_dict_03a.xml

src/tests/python-tests/testdata/wccl_dict_03b.xml