NAUTOBOT_TOWER_URI should auto strip trailing slash

[jeffkala]

Environment

• Python version: 3.7
• Nautobot version: 1.2.5
• nautobot-plugin-chatops-ansible version: Current

Steps to Reproduce

1. Setup extension with uri of http://towerorawx.example.com/ with trailing slash
2. Run ansible chatops command.

Expected Behavior

Expected it to work and auto-detect a trailing slash and remove it.

Observed Behavior

Traceback errors.

[jeffkala]

Assign to me