SSDM-2130 : V3 AS API - finish up js tests - refactoring

...ests/1/as/webapps/openbis-v3-api-test/html/test/common.js

...sts/1/as/webapps/openbis-v3-api-test/html/test/dataset.js

.../1/as/webapps/openbis-v3-api-test/html/test/experiment.js

.../tests/1/as/webapps/openbis-v3-api-test/html/test/main.js

...ts/1/as/webapps/openbis-v3-api-test/html/test/material.js

...sts/1/as/webapps/openbis-v3-api-test/html/test/project.js

...ests/1/as/webapps/openbis-v3-api-test/html/test/sample.js

...tests/1/as/webapps/openbis-v3-api-test/html/test/space.js

...1/as/webapps/openbis-v3-api-test/html/test/test-create.js

...1/as/webapps/openbis-v3-api-test/html/test/test-delete.js

...ts/1/as/webapps/openbis-v3-api-test/html/test/test-dto.js

.../1/as/webapps/openbis-v3-api-test/html/test/test-login.js

...ts/1/as/webapps/openbis-v3-api-test/html/test/test-map.js

...1/as/webapps/openbis-v3-api-test/html/test/test-search.js

...1/as/webapps/openbis-v3-api-test/html/test/test-update.js

...-plugins/tests/1/dss/reporting-plugins/js-test/js-test.py