StrategyAm3Crv & StrategyBtcCurve migration#1

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iamsahu wants to merge 4 commits intoStakeDAO:mainfrom iamsahu:feat/polygon-strat-migration-May2022

+580-210

Commits on May 4, 2022

feat: StrategyAm3Crv & StrategyBtcCurve migration
iamsahu
committed

Commits on May 7, 2022

fix: extra earn for am3crv & old strategy check for btc strat
iamsahu
committed

Commits on May 9, 2022

fix: added test to check old gauge values
iamsahu
committed

Commits on May 10, 2022

feat: harvest added to Am3Crv migration test
iamsahu
committed