Add gathering of admin parameters for MongoDB by pt-mongodb-summary

User story:

• as a PT user, I need to see MongoDB Configuration Options when I'm running pt-mongodb-summary so that I can get more information about the MongoDB server I'm analyzing

UI/UX:

Acceptance criteria

• user see an additional section in the output of the command with configuration options

Out of scope:

• an additional flag for presenting this data

Suggested implementation:
TBD

How to test:
Run the command against any MongoDB instance like:

./pt-mongodb-summary 127.0.0.1:17001

In the output there is a new section called # Command line arguments

Details:

The command to get data is:

db.adminCommand(

).parsed