SSDM-7189: PropertyAssignment: Java part implemented with tests

.../property/SearchPropertyAssignmentsOperationExecutor.java

...sapi/v3/translator/property/PropertyAssignmentRecord.java

.../v3/translator/property/PropertyAssignmentTranslator.java

...penbis/systemtest/asapi/v3/AbstractGetEntityTypeTest.java

...ch/ethz/sis/openbis/systemtest/asapi/v3/AbstractTest.java

...z/sis/openbis/systemtest/asapi/v3/GetDataSetTypeTest.java

...is/openbis/systemtest/asapi/v3/GetExperimentTypeTest.java

.../sis/openbis/systemtest/asapi/v3/GetMaterialTypeTest.java

...hz/sis/openbis/systemtest/asapi/v3/GetSampleTypeTest.java

...bis/generic/asapi/v3/dto/property/PropertyAssignment.java

...property/fetchoptions/PropertyAssignmentFetchOptions.java

...a/ch/ethz/sis/openbis/generic/sharedapi/v3/dictionary.txt