SSDM-3907: create configurable plugins for new ftp / cifs file structure

...isd/openbis/dss/generic/server/cifs/CifsServerConfig.java

...openbis/dss/generic/server/ftp/FtpPathResolverConfig.java

.../dss/generic/server/ftp/v3/V3ExperimentLevelResolver.java

...openbis/dss/generic/server/ftp/v3/V3FileSystemPlugin.java

.../dss/generic/server/ftp/v3/V3FtpPathResolverRegistry.java

.../generic/server/ftp/v3/V3HierarchicalContentResolver.java

...d/openbis/dss/generic/server/ftp/v3/V3PluginResolver.java

...bis/dss/generic/server/ftp/v3/V3ProjectLevelResolver.java

...sx/cisd/openbis/dss/generic/server/ftp/v3/V3Resolver.java

...penbis/dss/generic/server/ftp/v3/V3RootLevelResolver.java

...enbis/dss/generic/server/ftp/v3/V3SpaceLevelResolver.java

...h/systemsx/cisd/openbis/dss/generic/shared/Constants.java

.../cisd/openbis/dss/generic/shared/utils/DssPluginType.java