Updates for SPD QA

Updates for SPD QA
I have modified the SPD task for the QA train for two reasons :
- revisiting included histograms
- getting rid of all the online-offline numbering conventions in the task.

For the second item I have created another class, AliSPDUtils, which makes the all the conversions (it is made up of static methods only).

I attached my modified runPilot.C macro which I used to test everything locally (basically I removed the loading of libraries and I commented
out the setcollisioncandidates for my task).

(A. Mastroserio)