Bugfix mobilepayment

[falkecarlsen]

• Turns out customer_name was non-null non-blank was disallowed, however our MobilePay API does not give us this data, so it should be nullable when/if we get this additional data. This data could make payment matching better.
• MySQL in production does not support emojies, which makes cronjob-autopayment fail. Added stripping util method to comment from MobilePay API .

[codecov-commenter]

Codecov Report

Merging #247 (e072355) into next (162b640) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             next     #247      +/-   ##
==========================================
+ Coverage   82.42%   82.48%   +0.06%     
==========================================
  Files          30       30              
  Lines        2247     2255       +8     
  Branches      157      157              
==========================================
+ Hits         1852     1860       +8     
  Misses        370      370              
  Partials       25       25              

Impacted Files	Coverage Δ
stregsystem/models.py	90.68% <100.00%> (ø)
stregsystem/tests.py	99.73% <100.00%> (+<0.01%)	⬆️
stregsystem/utils.py	73.86% <100.00%> (+1.24%)	⬆️

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