Fix for IP Whitelist errors (suspected API race condition) - #31

[mmindenhall]

I suspect the problem here is with the Atlas API, not the provider. Using a mutex in the provider resolved the issue.

[codecov-io]

Codecov Report

Merging #33 into master will decrease coverage by 0.09%. The diff coverage is 0%.

@@            Coverage Diff            @@
##           master      #33     +/-   ##
=========================================
- Coverage   45.56%   45.46%   -0.1%     
=========================================
  Files          10       10             
  Lines         935      937      +2     
=========================================
  Hits          426      426             
- Misses        509      511      +2

Impacted Files	Coverage Δ
mongodbatlas/resource_mongodbatlas_ip_whitelist.go	38.04% <0%> (-0.85%)	:arrow_down:

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[akshaykarle]

Interesting issue. I will merge this in if you say it resolves the problem but not sure how it did the mutex helped. Thank you for the PR

[akshaykarle]

closes #33

[mmindenhall]

I think the actual race condition is in the Atlas API implementation. Using a mutex here simply serializes the API requests to avoid the race condition.

[mmindenhall]

BTW I opened an issue in MongoDB's JIRA.