add necessary storage migrations #755

Job	Run time
build-try-runtime-and-benchmarks	5m 49s
Build Runtimes (encointer-node-notee)	3m 30s
Cancel Previous Runs	2s
build	3m 57s
cargo-toml-fmt	8s
Rust check +nightly fmt --all -- --check (x86_64-unknown-linux-gnu)	44s
unit-tests	2m 36s
Rust check clippy -p encointer-client-notee (x86_64-unknown-linux-gnu)	5m 41s
test_bootstrap_demo_community.sh	18m 49s
test_bot_community.sh	7m 42s
test_register_business.sh	2m 1s
Draft Release	0s
Publish Runtimes	0s
	50m 59s

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