YIP-107: Vesting Pool Sunset, Migration, and Mint

TLDR:

1. Original vesting contract contained a bug which has locked 370975 $YAM in the contract. They are unable to be retrieved.

Passing proposal successfully would result with:

1. Transferring from the vesting pool contract to the treasury 5215 YAM (2086 BoU).
2. Minting whats left in the vesting pool contract (subtracting the 5215 YAM), mint 370975 YAM (148390 BoU).

For more details, please refer to the forum post.