Convex claim and lock zap contract

Modified and stripped down versions of the Convex claim and stake all zap contract.

Unlike the currently available contract both versions will:

• Lock your claimed CVX rewards instead of staking them
• Sweep your current wallet balance of CVX, CRV & CVXCRV and stake/lock accordingly.

The lite contract ClaimLockZapLite does not claim rewards from LP and is cheaper to deploy.