MongoDB Span doesn't have the correct MongoDB command name

[matthew-petrie]

Describe the bug

The MongoDB span is not always showing the correct command i.e. find instead of findOne

Expected behavior

To show the same MongoDB command as is being used.

Environment (please complete the following information)

• OS: Linux
• Node.js version: 12
• APM Server version: 3.2.0
• MongoDB version: 3.4.0

How are you starting the agent? (please tick one of the boxes)

• [X ] Calling agent.start() directly (e.g. require('elastic-apm-node').start(...))
• [ ] Requiring elastic-apm-node/start from within the source code
• [ ] Starting node with -r elastic-apm-node/start

Additional context

In the image below the span name starting with MongoDB is a span we manually added which shows the correct MongoDB command findOne