Fix typo

[style95]

Description

This is to fix typo.

Related issue and scope

• I opened an issue to propose and discuss this change (#????)

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 #5352 (39b7040) into master (40944e6) will decrease coverage by 0.84%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5352      +/-   ##
==========================================
- Coverage   76.64%   75.80%   -0.84%     
==========================================
  Files         240      240              
  Lines       14407    14407              
  Branches      601      601              
==========================================
- Hits        11042    10921     -121     
- Misses       3365     3486     +121     

Impacted Files	Coverage Δ
...whisk/connector/kafka/KafkaProducerConnector.scala	56.09% <0.00%> (-24.40%)	⬇️
...whisk/connector/kafka/KafkaConsumerConnector.scala	59.15% <0.00%> (-22.54%)	⬇️
.../scala/org/apache/openwhisk/utils/Exceptions.scala	20.00% <0.00%> (-20.00%)	⬇️
...rg/apache/openwhisk/core/controller/Triggers.scala	81.37% <0.00%> (-13.11%)	⬇️
...hisk/core/controller/actions/SequenceActions.scala	82.11% <0.00%> (-9.76%)	⬇️
...core/controller/BasicAuthenticationDirective.scala	92.30% <0.00%> (-7.70%)	⬇️
...sk/core/containerpool/docker/DockerContainer.scala	87.91% <0.00%> (-7.70%)	⬇️
...pache/openwhisk/core/entity/ConcurrencyLimit.scala	88.23% <0.00%> (-5.89%)	⬇️
...pache/openwhisk/core/containerpool/Container.scala	79.56% <0.00%> (-4.31%)	⬇️
...rg/apache/openwhisk/core/controller/ApiUtils.scala	60.68% <0.00%> (-4.28%)	⬇️
... and 22 more

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