Accept non-standard status codes.

[rabbah]

Description

Related issue and scope

• I opened an issue to propose and discuss this change (Accept non-standard status codes. #5149)

My changes affect the following components

• API
• Controller
• Message Bus (e.g., Kafka)
• Loadbalancer
• Scheduler
• Invoker
• Intrinsic actions (e.g., sequences, conductors)
• Data stores (e.g., CouchDB)
• Tests
• Deployment
• CLI
• General tooling
• Documentation

Types of changes

• Bug fix (generally a non-breaking change which closes an issue).
• Enhancement or new feature (adds new functionality).
• Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• I signed an Apache CLA.
• I reviewed the style guides and followed the recommendations (Travis CI will check :).
• I added tests to cover my changes.
• My changes require further changes to the documentation.
• I updated the documentation where necessary.

[codecov-commenter]

Codecov Report

Merging #5149 (9f87f15) into master (0cdfdb3) will increase coverage by 30.65%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master    #5149       +/-   ##
===========================================
+ Coverage   43.96%   74.62%   +30.65%     
===========================================
  Files         231      231               
  Lines       12807    12804        -3     
  Branches      528      529        +1     
===========================================
+ Hits         5631     9555     +3924     
+ Misses       7176     3249     -3927     

Impacted Files	Coverage Δ
.../apache/openwhisk/core/controller/WebActions.scala	89.30% <100.00%> (+89.30%)	⬆️
...whisk/connector/kafka/KafkaConsumerConnector.scala	59.15% <0.00%> (-22.54%)	⬇️
...pache/openwhisk/core/invoker/InvokerReactive.scala	58.62% <0.00%> (-20.69%)	⬇️
.../scala/org/apache/openwhisk/utils/Exceptions.scala	20.00% <0.00%> (-20.00%)	⬇️
...whisk/connector/kafka/KafkaProducerConnector.scala	60.00% <0.00%> (-20.00%)	⬇️
.../scala/org/apache/openwhisk/core/WhiskConfig.scala	95.62% <0.00%> (-0.03%)	⬇️
...e/openwhisk/core/containerpool/ContainerPool.scala	96.86% <0.00%> (+1.56%)	⬆️
.../org/apache/openwhisk/core/entity/EntityPath.scala	100.00% <0.00%> (+1.88%)	⬆️
...la/org/apache/openwhisk/common/TransactionId.scala	94.38% <0.00%> (+2.24%)	⬆️
.../org/apache/openwhisk/common/NestedSemaphore.scala	84.84% <0.00%> (+3.03%)	⬆️
... and 128 more

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[dgrove-oss]

LGTM