LMS-2172 IDataSetPathInfoProvider extended by method listPathInfosByRegularExpression

...d/etlserver/path/DatabaseBasedDataSetPathsInfoFeeder.java

...e/java/ch/systemsx/cisd/etlserver/path/IPathsInfoDAO.java

...emsx/cisd/etlserver/path/PathInfoDatabaseFeedingTask.java

.../generic/server/DatabaseBasedDataSetPathInfoProvider.java

.../openbis/dss/generic/shared/IDataSetPathInfoProvider.java

...lserver/path/DatabaseBasedDataSetPathsInfoFeederTest.java