use account provider (#361)

Cargo.dev.toml

auction/Cargo.toml

authority/Cargo.toml

authority/src/mock.rs

benchmarking/Cargo.toml

currencies/Cargo.toml

gradually-update/Cargo.toml

nft/Cargo.toml

oracle/Cargo.toml

oracle/rpc/Cargo.toml

oracle/rpc/runtime-api/Cargo.toml

rewards/Cargo.toml

tokens/Cargo.toml

tokens/src/lib.rs

tokens/src/mock.rs

tokens/src/tests.rs

traits/Cargo.toml

utilities/Cargo.toml

vesting/Cargo.toml