[WIP] Migrations necessary for Edgeware Node Upgrade

[apopiak]

PR for creating the migrations necessary for the runtime upgrade from v1.0.1redo to time-travel.

Included Migrations

• balances migration (Revert "Remove balances migration. (Remove balances migration. paritytech/substrate#5224)" (This reverts commit e1fcc9796a576a9fb78e0a5e23830ae87171015b)).

related to hicommonwealth/edgeware-node#164

[drewstone]

I think this is missing at least 1 thing, namely weights to this function:

error: `on_runtime_upgrade` must return Weight, signature has changed.
   --> /Users/drewstone/.cargo/git/checkouts/substrate-174177a5e735c2b8/a89dfc5/frame/balances/src/lib.rs:405:1
    |
405 | / decl_module! {
406 | |     pub struct Module<T: Trait<I>, I: Instance = DefaultInstance> for enum Call where origin: T::Origin {
407 | |         type Error = Error<T, I>;
408 | |
...   |
550 | |     }
551 | | }
    | |_^
    |
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)