format: format the invoker's Dockerfile

[ZinuoCai]

format: format the invoker's Dockerfile

Description

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
• 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-io]

Codecov Report

Merging #5037 (01c4e79) into master (4babe39) will decrease coverage by 47.90%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #5037       +/-   ##
===========================================
- Coverage   83.81%   35.91%   -47.91%     
===========================================
  Files         202      202               
  Lines        9818     9818               
  Branches      416      416               
===========================================
- Hits         8229     3526     -4703     
- Misses       1589     6292     +4703     

Impacted Files	Coverage Δ
...a/org/apache/openwhisk/common/ConfigMapValue.scala	0.00% <0.00%> (-100.00%)	⬇️
.../apache/openwhisk/core/controller/Namespaces.scala	0.00% <0.00%> (-100.00%)	⬇️
...pache/openwhisk/core/controller/CorsSettings.scala	0.00% <0.00%> (-100.00%)	⬇️
...che/openwhisk/core/entitlement/RateThrottler.scala	0.00% <0.00%> (-100.00%)	⬇️
...he/openwhisk/core/entitlement/KindRestrictor.scala	0.00% <0.00%> (-100.00%)	⬇️
...penwhisk/core/database/cosmosdb/CosmosDBUtil.scala	0.00% <0.00%> (-100.00%)	⬇️
.../openwhisk/core/entitlement/ActionCollection.scala	0.00% <0.00%> (-100.00%)	⬇️
.../openwhisk/core/entitlement/LocalEntitlement.scala	0.00% <0.00%> (-100.00%)	⬇️
...nwhisk/core/database/cosmosdb/CosmosDBConfig.scala	0.00% <0.00%> (-100.00%)	⬇️
...openwhisk/core/entitlement/PackageCollection.scala	0.00% <0.00%> (-100.00%)	⬇️
... and 133 more

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[rabbah]

Thanks @ZinuoCai