[LMS-1845] refactorization: reuse xml transformation code

...eneric/client/web/server/util/XMLPropertyTransformer.java

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

.../openbis/generic/server/dataaccess/PropertyValidator.java

...ss/db/dynamic_property/calculator/XmlPropertyAdaptor.java

...h/systemsx/cisd/openbis/generic/shared/util/XmlUtils.java

...penbis/generic/server/business/bo/PropertyTypeBOTest.java

...bis/generic/server/business/bo/PropertyValidatorTest.java

...ic_property/calculator/DynamicPropertyCalculatorTest.java

...stemsx/cisd/openbis/generic/shared/util/XmlUtilsTest.java