Hot Fix: Added ADC Cached Registers w/backwards compatibility

[bdorney]

Description

After CTP7 FW version 3.7.1 the ADCX registers have been converted to ADCX_CACHED and ADCX_UPDATE for X = 0,1.

I've added a backwards compatible change to check if ADCX_CACHED exists, and if so it is used; otherwise ADCX will be used.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Motivation and Context

See discussion above.

How Has This Been Tested?

Ran temperature monitoring measurements: http://cmsonline.cern.ch/cms-elog/1077701

While VFAT info is not shown in the output it is always written to the output file.

Screenshots (if appropriate):

Checklist:

• [X] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [X] I have added tests to cover my changes.
• [X] All new and existing tests passed.

[bdorney]

Superceded by https://github.com/cms-gem-daq-project/ctp7_modules/pull/91