fix ambiguous redis connection config

[Kerkesni]

Redis sentinel is what's deployed in S3C, to connect to it we use "sentinels" field in redis config that contains the host/port of each sentinel.

In Artesca we use the "host" and "port" fields to connect to the redis instance.

The config rules were adapted to make sure we don't pass all the fields at once which might make the config ambiguous to understand, although the redis client seems to handle this case well, as it first checks the sentinel config before connecting using the host/port fields.

Default values for redis host/port were removed from the config definition and put inside the default/dev config file.

Issue: BB-522

[bert-e]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.33%. Comparing base (a1e9895) to head (d20c311).
Report is 1 commits behind head on development/8.6.

Additional details and impacted files

Files with missing lines	Coverage Δ
lib/config.joi.js	100.00% <ø> (ø)

Components	Coverage Δ
Bucket Notification	66.66% <ø> (ø)
Core Library	74.00% <ø> (ø)
Ingestion	68.70% <ø> (ø)
Lifecycle	74.86% <ø> (ø)
Oplog Populator	82.95% <ø> (ø)
Replication	57.42% <ø> (ø)
Bucket Scanner	85.76% <ø> (ø)

@@               Coverage Diff                @@
##           development/8.6    #2543   +/-   ##
================================================
  Coverage            69.33%   69.33%           
================================================
  Files                  194      194           
  Lines                12791    12791           
================================================
  Hits                  8869     8869           
  Misses                3912     3912           
  Partials                10       10           

Flag	Coverage Δ
api:retry	9.66% <ø> (ø)
api:routes	9.56% <ø> (ø)
bucket-scanner	85.76% <ø> (ø)
ingestion	12.47% <ø> (ø)
lib	7.55% <ø> (ø)
lifecycle	19.39% <ø> (ø)
notification	0.88% <ø> (ø)
replication	18.97% <ø> (ø)
unit	42.94% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[Kerkesni]

/approve

[bert-e]

Integration data created

I have created the integration data for the additional destination branches.

• this pull request will merge improvement/BB-522 into
  development/8.6
• w/8.7/improvement/BB-522 will be merged into development/8.7

The following branches will NOT be impacted:

• development/7.10
• development/7.4
• development/7.70
• development/8.5

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integration pull requests in addition to integration branches, with:

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The following options are set: approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/8.6

• ✔️ development/8.7

The following branches have NOT changed:

• development/7.10
• development/7.4
• development/7.70
• development/8.5

Please check the status of the associated issue BB-522.

Goodbye kerkesni.

The following options are set: approve