Add command name for call sites to InvokeCmd

[abhijat]

When calling InvokeCmd callers should provide command name so that metrics are updated correctly.

[romange]

@abhijat wha's the status of this? @adiholden do we need it for 1.29?

[abhijat]

I have yet to start working on this. I hope to start this tomorrow and have a PR before end of this week.