[LMS-1818] save python scripts; add scripts to ETPT assignments

...temsx/cisd/openbis/generic/client/console/Assignment.java

...enbis/generic/client/web/client/ICommonClientService.java

.../generic/client/web/client/ICommonClientServiceAsync.java

...d/openbis/generic/client/web/client/application/Dict.java

.../client/application/framework/DisplayTypeIDGenerator.java

...eric/client/web/client/application/ui/AddGroupDialog.java

...ric/client/web/client/application/ui/AddScriptDialog.java

.../generic/client/web/client/application/ui/ScriptGrid.java

.../client/web/client/application/ui/amc/AddGroupDialog.java

...ent/application/ui/columns/specific/ScriptColDefKind.java

...t/web/client/application/ui/field/ScriptChooserField.java

...lication/ui/property_type/PropertyTypeAssignmentForm.java

...penbis/generic/client/web/server/CommonClientService.java

...d/openbis/generic/server/CommonBusinessObjectFactory.java

...ch/systemsx/cisd/openbis/generic/server/CommonServer.java

...temsx/cisd/openbis/generic/server/CommonServerLogger.java

...is/generic/server/business/bo/AbstractBusinessObject.java

.../generic/server/business/bo/EntityTypePropertyTypeBO.java

...eric/server/business/bo/ICommonBusinessObjectFactory.java

...generic/server/business/bo/IEntityTypePropertyTypeBO.java