Recover mode for debt assets with GS

# Problem
Actually assets, which are in a global settlement need to have a CR ≥ MCR, to retrieve.
From collateral side a CR ≥ 1 is only needed, to fully back the debt asset.

# Solution
1. Lower MCR of a asset to 1.01, when it is in a global settlement.
2. Lower MSSR to 1.01
3. When bitAsset is outside of GS, increase the MCR every day by + 2.5%
until MCR has the old value
4. Increase MSSR every day by 0.1% until the old value
5. Use global settlement protection

# Market dynamics
1. To retrieve a GS the market needs an upwards trend
2. The price feed gets everyday a bigger margin, when MCR increases
3. Margin positions can be eaten, when feed price is outside the GS protection