INDY-733: Implemented wallet migration mechanism
INDY-733: Implemented wallet migration mechanism

spivachuk/sovrin-node,keenondrums/sovrin-node,spivachuk/sovrin-node,keenondrums/sovrin-node,TechWritingWhiz/indy-node,TechWritingWhiz/indy-node,spivachuk/sovrin-node,TechWritingWhiz/indy-node,keenondrums/sovrin-node,spivachuk/sovrin-node,TechWritingWhiz/indy-node