TMSS-165: replaced quotum(s) by quota

...igrations/0003_projectquotum_resourcetype_resourceunit.py

SAS/TMSS/src/tmss/tmssapp/models/specification.py

SAS/TMSS/src/tmss/tmssapp/serializers/specification.py

SAS/TMSS/src/tmss/tmssapp/viewsets/specification.py

SAS/TMSS/src/tmss/urls.py

SAS/TMSS/test/t_tmssapp_specification_REST_API.py

SAS/TMSS/test/t_tmssapp_specification_django_API.py

SAS/TMSS/test/tmss_test_data_django_models.py

SAS/TMSS/test/tmss_test_data_rest.py