Metrics#1

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josiahsams wants to merge 6 commits intokmadhugit:catalyst_debug_v2.1.0-rc5from

josiahsams:metrics

Commits on Mar 8, 2017

Commits on Mar 10, 2017

handle lazy serialization
josiahsams
committed

Commits on Mar 13, 2017

fix cluster issue with accumulators
josiahsams
committed

Commits on Mar 14, 2017

fix for metrics adding in executor side generated code
josiahsams
committed