model-server: Parametize custom property definitions

src/mol-util/console-logger.ts

src/servers/model/config.ts

src/servers/model/preprocess/master.ts

src/servers/model/preprocess/parallel.ts

src/servers/model/properties/pdbe.ts

src/servers/model/properties/providers/pdbe.ts

src/servers/model/property-provider.ts

src/servers/model/utils/fetch-retry.ts