change the server side wallet file from [username].id to [user_id].id

[rtang03]

the server-side wallet is named with [username].id If the username is changed by ui-control webpage, it only change the username in auth-server. The server-side wallet is unchanged. To fix it, need to change the wallet entry to [user_id].id.

This will impact

• createWallet file in both ui-account and ui-control
• all gw-org resolvers' mutation, which write to Fabric.

[rtang03]

I underestimated the issue. This solution does not work.

As a workaround, disable the feature of renaming username, to avoid the bug, instead of fixing the bug.