marketplace: add exception handling for reconciler (PROJQUAY-233)

[Marcusk19]

Add exception handling for stripe api if it receives a bad request for a user's stripe id.

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (4f0c8db) 70.58% compared to head (edc08b6) 70.59%.
Report is 2 commits behind head on master.

Files	Patch %	Lines
workers/reconciliationworker.py	37.50%	7 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2560   +/-   ##
=======================================
  Coverage   70.58%   70.59%           
=======================================
  Files         434      434           
  Lines       39855    39856    +1     
  Branches     5168     5166    -2     
=======================================
+ Hits        28131    28135    +4     
- Misses      10100    10104    +4     
+ Partials     1624     1617    -7     

Flag	Coverage Δ
unit	70.59% <52.38%> (+<0.01%)	⬆️

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