added utility functions to set up db, keymanager, ethereum init and simplify key tasks
added utility functions to set up db, keymanager, ethereum init and simplify key tasks

maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum