refactoring: extracted creation of input fields for managed properties to a factory

.../generic/shared/basic/dto/ManagedUiActionDescription.java

...c/shared/basic/dto/ManagedUiActionDescriptionFactory.java

.../basic/dto/api/IManagedInputWidgetDescriptionFactory.java

...penbis/generic/shared/basic/dto/api/IManagedUiAction.java

...ric/shared/managed_property/ManagedPropertyFunctions.java

...systemsx/cisd/openbis/generic/shared/CommonTestUtils.java

...shared/managed_property/ManagedPropertyEvaluatorTest.java

.../generic/shared/managed_property/configureUIInput-test.py

...generic/shared/managed_property/configureUIOutput-test.py

...rty/structured/StructuredPropertyConverterPythonTest.java

...nbis/generic/shared/managed_property/updateFromUI-test.py