Fixed ethstore-cli output

[svyatonik]

Before fix:

svyatonik@xwnotebook:~/dev/parity.testss$ ./ethstore insert 834cb736f02d9c968dfaf0c37658a1d86ff140554fc8b59c9fdad5a8cf810eec password --dir db.dev_ss1/keys/DevelopmentChain/
0xStoreAccountRef { address: 261e9dbf51fe9f8b7339269940ac08124de8d557, vault: Root }

After fix:

svyatonik@xwnotebook:~/dev/parity.testss$ ./ethstore insert 834cb736f02d9c968dfaf0c37658a1d86ff140554fc8b59c9fdad5a8cf810eec password --dir db.dev_ss1/keys/DevelopmentChain/
0x261e9dbf51fe9f8b7339269940ac08124de8d557

Looks like it was broken since vaults introduction.

[tomusdrw]

No build? CC @paritytech/ci