HTTPCameraAgent Add more exceptions

[davidvng]

Description

Another attempt at catching the exceptions in the HTTPCameraAgent. Surely this will be the last fix needed.

Motivation and Context

requests.exceptions.ConnectionError found in logs causing agent to crash.

How Has This Been Tested?

Tested on daq-dev

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.