probe trials randomization

[ananthamurthy]

The probe trials across sessions occur predictably. The randomSeed() needs to be checked.

[dilawar]

Can you write down the numbers of probe trials.

[ananthamurthy]

Probe Trials: 3, 21, 30, 40, 57, 59

[ananthamurthy]

The probeTrials should occur randomly every 5-9 trials.

[dilawar]

This should have been fixed on devel branch. Will merge into master after tests are successful.