This proposes to change oracle used to determine vDOT price to be fair value oracle supplied directly by Bifrost instead of market price oracle provided by DIA.
As this change lowers chance of the random liquidations caused by market fluctuations, the supply cap can be increased as well.

#### vDOT reserve changes
- supply cap 333k -> 666k
- oracle provider DIA -> Bifrost

calls

Executed

Submitted

DecisionStarted

DecisionDepositPlaced

ConfirmStarted

Confirmed

economic_parameters

vDOT fair value oracle & supply cap increase

root

whitelisted_caller

referendum_canceller

referendum_killer

general_admin

treasurer

spender

tipper

omnipool_admin

Origin able to dispatch a whitelisted call.

 Origin for spending very high amounts of HDX(<= 50M HDX) from the treasury as well as generally administering it.

Origin able to spend up to 2,222,222 HDX from the treasury at once.

Origin able to spend up to 50K HDX from the treasury at once.

Origin able to perform specific Omnipool-related actions.