[SPARK-10003] Improve readability of DAGScheduler#8217

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andrewor14 wants to merge 3 commits intoapache:masterfrom

andrewor14:dag-scheduler-readability

Commits on Aug 14, 2015

Remove unnecessary code + minor code rewrites
Andrew Or
committed

Commits on Sep 3, 2015

Merge branch 'master' of github.com:apache/spark into dag-scheduler-readability
Andrew Or
committed
Move comment back into if case
Andrew Or
committed