Update ansible with new scheduler instructions

[hunhoffe]

Add instructions to add configuration for akka dispatcher, add complete file paths in two places

Description

When trying to deploy the new scheduler with ansible, I kept getting this error in the scheduler:

Exception in thread "main" akka.ConfigurationException: Dispatcher [dispatchers.lease-service-dispatcher] not configured for path akka://scheduler-actor-system/user/$b

Adding the dispatcher to the references.conf file fixed the error, and now I can deploy the scheduler via ansible.
I've just tested this locally by invoking a few functions after deployment.

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 :).
• [N/A] I added tests to cover my changes.
• [N/A] My changes require further changes to the documentation.
• I updated the documentation where necessary.

[codecov-commenter]

Codecov Report

Merging #5202 (5f61366) into master (5332e6d) will increase coverage by 19.60%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #5202       +/-   ##
===========================================
+ Coverage   44.65%   64.26%   +19.60%     
===========================================
  Files         238      238               
  Lines       13937    13937               
  Branches      581      581               
===========================================
+ Hits         6224     8957     +2733     
+ Misses       7713     4980     -2733     

Impacted Files	Coverage Δ
...hisk/core/scheduler/message/ContainerMessage.scala	0.00% <0.00%> (-100.00%)	⬇️
.../openwhisk/core/scheduler/FPCSchedulerServer.scala	0.00% <0.00%> (-95.84%)	⬇️
...nwhisk/core/scheduler/queue/ContainerCounter.scala	0.00% <0.00%> (-92.11%)	⬇️
...sk/core/scheduler/container/ContainerManager.scala	0.00% <0.00%> (-88.72%)	⬇️
...e/openwhisk/core/scheduler/queue/MemoryQueue.scala	0.00% <0.00%> (-83.74%)	⬇️
.../core/scheduler/container/CreationJobManager.scala	0.00% <0.00%> (-83.34%)	⬇️
...scheduler/queue/ElasticSearchDurationChecker.scala	0.00% <0.00%> (-80.77%)	⬇️
.../main/scala/org/apache/openwhisk/core/WarmUp.scala	21.42% <0.00%> (-78.58%)	⬇️
...core/scheduler/queue/SchedulingDecisionMaker.scala	0.00% <0.00%> (-73.18%)	⬇️
.../openwhisk/core/scheduler/queue/QueueManager.scala	8.00% <0.00%> (-65.46%)	⬇️
... and 145 more

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[style95]

LGTM!
Thanks, Erika for the contribution.

[bdoyle0182]

LGTM, were about to start work with migrating to the new scheduler in April as well