[LMS-653] add: - Some Unit tests.

...ch/systemsx/cisd/openbis/generic/server/CommonServer.java

...sd/openbis/generic/server/business/bo/PropertyTypeBO.java

...d/openbis/generic/server/dataaccess/IPropertyTypeDAO.java

...openbis/generic/server/dataaccess/db/PropertyTypeDAO.java

...d/openbis/generic/server/dataaccess/db/VocabularyDAO.java

.../generic/client/web/server/AbstractClientServiceTest.java

...is/generic/client/web/server/CommonClientServiceTest.java

...ystemsx/cisd/openbis/generic/server/CommonServerTest.java

...bis/generic/server/dataaccess/db/PropertyTypeDAOTest.java

...enbis/generic/server/dataaccess/db/VocabularyDAOTest.java

...x/cisd/openbis/generic/shared/AbstractServerTestCase.java