Merge remote-tracking branch 'origin/master'

add discrete sdr compare

Update README.md

adjust main.py code

Add environment requirement.txt file

fix sensor name capitalized issue(all upper or all lower in spec) and improve README.md file

sensor reading is na, threshold should be na, yes then pass

improve README.md file -- enter format

improve README.md file

if spec has Tjmax, then judge ipmi threshold whether not "na", yes then pass

add test result color(red/green/gold) to specify cell

when sensor reading is "na", no compare threshold.

when sensor reading is "na", no compare threshold.

create a excel file to save sensor_name and test_result, and improve README.md

fix: log file record many times test result data issue