Fixes jinja warning from controller playbook

[mptap]

Fixes #3639

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 #4064 into master will decrease coverage by 4.8%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4064      +/-   ##
==========================================
- Coverage   85.98%   81.18%   -4.81%     
==========================================
  Files         147      147              
  Lines        7180     7180              
  Branches      445      445              
==========================================
- Hits         6174     5829     -345     
- Misses       1006     1351     +345

Impacted Files	Coverage Δ
...core/database/cosmosdb/RxObservableImplicits.scala	0% <0%> (-100%)	⬇️
...core/database/cosmosdb/CosmosDBArtifactStore.scala	0% <0%> (-95.54%)	⬇️
...sk/core/database/cosmosdb/CosmosDBViewMapper.scala	0% <0%> (-92.6%)	⬇️
...whisk/core/database/cosmosdb/CosmosDBSupport.scala	0% <0%> (-83.34%)	⬇️
...abase/cosmosdb/CosmosDBArtifactStoreProvider.scala	0% <0%> (-58.83%)	⬇️
...la/whisk/core/database/cosmosdb/CosmosDBUtil.scala	92% <0%> (-4%)	⬇️
...rc/main/scala/whisk/common/ForcibleSemaphore.scala	88.46% <0%> (+3.84%)	⬆️
...whisk/connector/kafka/KafkaProducerConnector.scala	89.74% <0%> (+15.38%)	⬆️
.../scala/src/main/scala/whisk/utils/Exceptions.scala	40% <0%> (+20%)	⬆️

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[rabbah]

Thanks @mptap for the fixes!