network_traffic: fix passing of period and timeout parameters to agent

[efd6]

What does this PR do?

This fixes the passing of the flows period and timeout parameters which previously were passed to agent in the wrong location always resulting in the agent using the default values specified by packetbeat, 10s and 30s.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Author's Checklist

• [ ]

How to test this PR locally

To confirm this is working correctly, before running the tests with elastic-package, set the agent logging level to "debug". Run the system tests and when they have completed, step into the agent's terminal and collect diagnostics with ./elastic-agent diagnostics. Examine the log file for the log line describing packetbeat's understanding of the parameters, e.g. (note the period=-1s):

$ jq 'select(.message | startswith("new flows worker")).message' < elastic-agent-diagnostics-2023-04-06T04-52-21Z-00/logs/elastic-agent-20230406.ndjson
"new flows worker. timeout=5s, period=-1s, tick=5s, ticksTO=1, ticksP=-1"
"new flows worker. timeout=30s, period=1s, tick=1s, ticksTO=30, ticksP=1"
"new flows worker. timeout=30s, period=1s, tick=1s, ticksTO=30, ticksP=1"
"new flows worker. timeout=30s, period=-1s, tick=30s, ticksTO=1, ticksP=-1"

Related issues

• Fixes [Network Packet Capture] Flow Metrics not reported properly  #5771

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• Start Time: 2023-04-06T04:39:38.180+0000

• Duration: 73 min 58 sec

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Test	Results
Failed	0
Passed	178
Skipped	0
Total	178

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 50.0
Classes	100.0% (0/0)	💚 50.0
Methods	75.0% (48/64)	👍 5.769
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Conditionals	100.0% (0/0)	💚

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Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[elasticmachine]

Package network_traffic - 1.11.1 containing this change is available at https://epr.elastic.co/search?package=network_traffic

[Danouchka]

[Network Packet Capture] Network Flows dashboard is broken. Seems it comes with no dataview selected.