Used the parallelize distribution in the risk calculators
Merge branch 'change-dist-classical' into change-dist-risk
Merge branch 'save-disk-space' into change-dist-risk
Merged from calc_num_task_fix
Removed count_progress_risk
Fixed scenario and scenario_damage to use task_completed
Merge branch 'master' of github.com:gem/oq-engine into change-dist-risk
Now all risk calculators work with the parallelize distribution
Remove a now useless function
Now task_completed calls log_message and not viceversa
Merge pull request #1309 from gem/change-dist-risk

Change the distribution in the risk calculators