While in partial liquidation, `mint` will fail because of `enterMarket` check.

[yaronvel]

The following is a workaround for user who wants to deposit while in partial liquidation:
The example is for ZRX deposit.
Two calls:

1. ZRX.approve
2. special function call on contract which will call:
   a) cZRX.mint
   b) cZRX.approve
   c) avatar1.collectCToken