Changing originator to our SMS number

[DanJezeph15]

Changes the from_name from the companies sms name to our TutorCruncher number. This is then used in self.messagebird.post where we set the originator to from_name

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (2706a28) 92.42% compared to head (19107ff) 92.42%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #458   +/-   ##
=======================================
  Coverage   92.42%   92.42%           
=======================================
  Files          24       24           
  Lines        1293     1294    +1     
  Branches      146      146           
=======================================
+ Hits         1195     1196    +1     
  Misses         70       70           
  Partials       28       28           

Files Changed	Coverage Δ
src/settings.py	100.00% <100.00%> (ø)
src/worker/sms.py	90.81% <100.00%> (ø)

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