SSDM-2718: API extension for generic services. No implementations yet.

...s/openbis/generic/server/api/v3/ApplicationServerApi.java

...bis/generic/server/api/v3/ApplicationServerApiLogger.java

...erver/api/v3/executor/method/IServiceMethodsExecutor.java

...server/api/v3/executor/method/ServiceMethodsExecutor.java

...is/generic/server/api/v3/helper/generators/Generator.java

.../sis/openbis/generic/as/api/v3/IApplicationServerApi.java

.../ethz/sis/openbis/generic/as/api/v3/IServiceExecutor.java

...hz/sis/openbis/generic/as/api/v3/dto/service/Service.java

.../api/v3/dto/service/fetchoptions/ServiceFetchOptions.java

...s/api/v3/dto/service/fetchoptions/ServiceSortOptions.java

.../openbis/generic/as/api/v3/dto/service/id/IServiceId.java

...enbis/generic/as/api/v3/dto/service/id/ServicePermId.java