Fix problem not allowing accrual of indexes when RF (Reserve Factor) is configured as 100%

[eboadom]

Context

The problem/consequences are explained HERE.

How

Having a 100% RF is a legitimate configuration for a reserve, so the fix should be on the logic not properly handling that case, instead of only adding extra validation to not allow a set of 100%.

To be researched deeper, but highly probable that the change should be done around the condition of ReserveLogic not contemplating the 100% RF scenario.

Other initial aspects to consider:

• Gas implications of the fix should be checked.

• New tests should be added for the 100% RF case.

• The fix should be applied on both the v2 version deployed on Polygon/Avalanche and the one on Aave v2 Ethereum. Initially, in what concerns this part of the logic, they should be exactly the same.

• Aave v2 Ethereum Fix for #315 (v2 Ethereum)  #317

• Aave v2 Polygon Fix for #315 (v2 Polygon) #316

• Aave v2 Avalanche Fix for #315 (Aave v2 Avalanche) #318