SSDM-5773: Implications of code review by Piotr.

.../v3/executor/entity/AbstractCreateEntityTypeExecutor.java

.../v3/executor/entity/AbstractUpdateEntityTypeExecutor.java

...entity/AbstractUpdateEntityTypePropertyTypesExecutor.java

...er/asapi/v3/executor/entity/DeleteEntityTypeExecutor.java

...ic/server/asapi/v3/executor/entity/IPluginIdProvider.java

...xecutor/entity/SetEntityTypeValidationScriptExecutor.java

...erver/asapi/v3/helper/entity/progress/EntityProgress.java

...to/entitytype/update/PropertyAssignmentListUpdateValue.js

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

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

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

...openbis/systemtest/asapi/v3/UpdateExperimentTypeTest.java

...s/openbis/systemtest/asapi/v3/UpdateMaterialTypeTest.java

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