[AAVE-59] Aave V2 - Liquidity Mining Update (90 days at 30% reduced rate)

This proposal is for voting on Aave's proposal #59 using DPI. Please review the proposal here: https://app.aave.com/governance/60-QmXBgxpgMCfHngBgsmd3HX3rvpu9E3kR4FSxZbQkoVM2un

Quorum for this vote is 109069 INDEX.