SeriesService: move stamps related methods from DAO and service

[php-coder]

To simplify interfaces/implementations I suggest to move stamps-related methods:

• JdbcSeriesDao.countAllStamps() -> JdbcStampsDao
• JdbcSeriesDao.countStampsOfCollection(Integer) -> JdbcStampsDao
• JdbcSeriesDaoImpl.countAllStamps() -> JdbcStampsDaoImpl
• JdbcSeriesDaoImpl.countStampsOfCollection(Integer) -> JdbcStampsDaoImpl
• SeriesService.countAllStamps() -> StampsService
• SeriesService.countStampsOf(Collection) -> StampsService
• SeriesServiceImpl.countAllStamps() -> StampsServiceImpl
• SeriesServiceImpl.countStampsOf(Collection) -> StampsServiceImpl