`wallet1_solo.json` can't be used in this test because it contains
committee member that receives reward for accepted blocks. The race in
this test happens due to the fact that it uses running blockchain and
checks expected GAS balance via call to blockchain's
GetUtilityTokenBalance API. This call is racy with the CLI command
executed prior to the call which causes the following test failure:
```
2023-04-06T08:44:08.6038406Z === NAME TestNEP17Balance/all_accounts
2023-04-06T08:44:08.6038738Z executor.go:240:
2023-04-06T08:44:08.6039454Z Error Trace: /opt/github-runner/_work/neo-go/neo-go/cli/nep_test/executor.go:240
2023-04-06T08:44:08.6040628Z /opt/github-runner/_work/neo-go/neo-go/cli/nep_test/executor.go:236
2023-04-06T08:44:08.6041787Z /opt/github-runner/_work/neo-go/neo-go/cli/nep_test/nep17_test.go:73
2023-04-06T08:44:08.6042389Z Error: Expect " Amount : 1" to match "^\s*Amount\s*:\s*1.5$"
2023-04-06T08:44:08.6042865Z Test: TestNEP17Balance/all_accounts
```
The fix is do not use committee accounts for balance checks. Let's use
side accounts and transfer funds to some of them before the test start.
Close#2960.
Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>
685d095fa4