QC False Failures Fix

[mattdturner]

Update QC script to properly handle cases when data in either hemisphere is bit-for-bit.

• Developer(s): Matthew Turner

• Please suggest code Pull Request reviewers in the column at right.

• Are the code changes bit for bit, different at roundoff level, or more substantial? bfb

• Is the documentation being updated with this PR? (Y/N) N
  If not, does the documentation need to be updated separately at a later time? (Y/N) N
  Note: "Documentation" includes information on the wiki and .rst files in doc/source/,
  which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/.

• Other Relevant Details:

[JFLemieux73]

Thanks Matt. I just tested it with the new script. It works:

INFO:main:Number of files: 1833
INFO:main:Two-Stage Test Passed
INFO:main:Quadratic Skill Test Passed for Northern Hemisphere
INFO:main:Southern Hemisphere data is bit-for-bit
INFO:main:
INFO:main:Quality Control Test PASSED