Add uno pins, fix mockcan teardown

[atulmerchia]

Pull Request (PR) into Code-2020

Code Description

Bug fixes for uno pinout and mockcan teardown

Testing Description

Dashboard test compiled on ecu-rev-10 branch

Additional Information

Checklist

• Is this code linked to a new board or board rev?
• • Is there a PR for that board in circuits-2020? If so, please pause until that PR is merged.
• Did you test the code in real-world conditions before submitting?
• • Did you use CPU Speed = 76 Mhz and Optimize = Faster when testing?
• Did you pull master into your branch?
• • Did you check for merge conflicts?
• • Did you resolve any that occurred? If you are having trouble or are confused, contact a lead!
• Did you fill out the above template?
• Did you assign the right people for review (on the right)?