[LMS-944] added usage of static constant value for max description length

...temsx/cisd/openbis/generic/shared/dto/AbstractTypePE.java

.../systemsx/cisd/openbis/generic/shared/dto/DataTypePE.java

.../ch/systemsx/cisd/openbis/generic/shared/dto/EventPE.java

.../ch/systemsx/cisd/openbis/generic/shared/dto/GroupPE.java

...temsx/cisd/openbis/generic/shared/dto/InvalidationPE.java

...temsx/cisd/openbis/generic/shared/dto/PropertyTypePE.java

...ystemsx/cisd/openbis/generic/shared/dto/VocabularyPE.java

...ava/ch/systemsx/cisd/openbis/generic/SystemTestSuite.java

...n/experiment/GenericExperimentAttachmentDownloadTest.java