[jobSender] Migrate to array jobs

[duartej]

The array jobs allow to send an huge amount of subjobs without dealing with the max. quotas of the queues.

[duartej]

The potential changes to perform:

• the maxEvents, skipEvents and output filename should contain a reference to the ${PBS_ARRAYID} variable. In the case of the maxEvents, skipEvents option, a file with the same number of lines as array jobs defined should do the trick, mapping the line with the arrayID

[duartej]

See branch jobArrays: incorporate the changes to use those jobs. So far 88a62e23,

• PBS cluster (tau)
• BlindJobs and Transformation jobs

are available. CERN cluster and athena joOption jobs should be incorporated