Some ambigous namespaces no well supported by g++ 4.1

And removed functions that were previously removed from DiskWriteTaskInterface

Conditions were misaligned inside WorkerThread::run and a MutexLock was missing at the begining of the finish function

files,blocks and waitCompletion have been dropped out

Changed consequently the types to use the interface instead of the derived type : RecallReportPacker

DiskReadThreadPool::WorkerThread::run has been changed consequently

 thus if m_failled is set at true, then the block is not usable

That way, the LogContext is no longer shared between different threads

The code was duplicated just bellow

A shared thread safe variable counts the number of failled writtings and we call reportEndOfSessionWithError at the end if needed

From void to bool : true if the file has been successfully written false otherwise

and thus changed the type to an auto_ptr into DiskWriteTask

Changed the constructor to take that into account and its calls in several files

RecallReportPacker is provided as a parameter of execute, and the opther attributes have been replaced by a FileToRecallStruct

Conflicts:
	castor/tape/tapeserver/utils/suppressUnusedVariable.hpp

Changed the constructor to take that into account, and changed the calls to the constructor where it was needed