[exporter/splunkhec] set a default of 10s for idle connection timeout

[atoulme]

Description:
Set the idle connection timeout to 10s by default rather than default 30s.

Link to tracking Issue:
Fixes #20543

Testing:
Unit tests pass.

Documentation:
No documentation impact.

[runforesight]

Foresight Summary

    
Major Impacts

build-and-test-windows duration(6 seconds) has decreased 31 minutes 52 seconds compared to main branch avg(31 minutes 58 seconds).

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⭕  build-and-test-windows workflow has finished in 6 seconds (31 minutes 59 seconds less than main branch avg.) and finished at 3rd Apr, 2023.

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Job	Failed Steps	Tests
windows-unittest-matrix	-     🔗	N/A	See Details
windows-unittest	-     🔗	N/A	See Details

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✅  check-links workflow has finished in 48 seconds and finished at 3rd Apr, 2023.

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changed files	-     🔗	N/A	See Details
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✅  telemetrygen workflow has finished in 1 minute 4 seconds and finished at 3rd Apr, 2023.

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build-dev	-     🔗	N/A	See Details
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✅  build-and-test workflow has finished in 37 minutes 46 seconds (8 minutes 37 seconds less than main branch avg.) and finished at 3rd Apr, 2023.

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Job	Failed Steps	Tests
unittest-matrix (1.20, connector)	-     🔗	✅ 126  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, connector)	-     🔗	✅ 126  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, internal)	-     🔗	✅ 583  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, internal)	-     🔗	✅ 583  ❌ 0  ⏭ 0    🔗	See Details
correctness-metrics	-     🔗	✅ 2  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, extension)	-     🔗	✅ 544  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, extension)	-     🔗	✅ 544  ❌ 0  ⏭ 0    🔗	See Details
correctness-traces	-     🔗	✅ 17  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, processor)	-     🔗	✅ 1557  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, processor)	-     🔗	✅ 1557  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, receiver-0)	-     🔗	✅ 2616  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, receiver-0)	-     🔗	✅ 2616  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, exporter)	-     🔗	✅ 2509  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, receiver-1)	-     🔗	✅ 1965  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, receiver-1)	-     🔗	✅ 1965  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, exporter)	-     🔗	✅ 2509  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, other)	-     🔗	✅ 4761  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.20, other)	-     🔗	✅ 4761  ❌ 0  ⏭ 0    🔗	See Details
integration-tests	-     🔗	✅ 56  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details
check-collector-module-version	-     🔗	N/A	See Details
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cross-compile (windows, 386)	-     🔗	N/A	See Details
cross-compile (windows, amd64)	-     🔗	N/A	See Details
build-package (deb)	-     🔗	N/A	See Details
build-package (rpm)	-     🔗	N/A	See Details
windows-msi	-     🔗	N/A	See Details
publish-check	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details
publish-dev	-     🔗	N/A	See Details

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✅  changelog workflow has finished in 2 minutes 44 seconds and finished at 3rd Apr, 2023.

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Job	Failed Steps	Tests
changelog	-     🔗	N/A	See Details

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✅  prometheus-compliance-tests workflow has finished in 11 minutes 59 seconds (⚠️ 5 minutes 32 seconds more than main branch avg.) and finished at 3rd Apr, 2023.

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Job	Failed Steps	Tests
prometheus-compliance-tests	-     🔗	✅ 21  ❌ 0  ⏭ 0    🔗	See Details

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✅  load-tests workflow has finished in 15 minutes 27 seconds (⚠️ 4 minutes 56 seconds more than main branch avg.) and finished at 3rd Apr, 2023.

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Job	Failed Steps	Tests
loadtest (TestTraceAttributesProcessor)	-     🔗	✅ 3  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestIdleMode)	-     🔗	✅ 1  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetric10kDPS|TestMetricsFromFile)	-     🔗	✅ 6  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceNoBackend10kSPS|TestTrace1kSPSWithAttrs)	-     🔗	✅ 8  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceBallast1kSPSWithAttrs|TestTraceBallast1kSPSAddAttrs)	-     🔗	✅ 10  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetricResourceProcessor|TestTrace10kSPS)	-     🔗	✅ 12  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestBallastMemory|TestLog10kDPS)	-     🔗	✅ 18  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details

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✅  e2e-tests workflow has finished in 12 minutes 53 seconds and finished at 3rd Apr, 2023.

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Job	Failed Steps	Tests
kubernetes-test (v1.26.0)	-     🔗	N/A	See Details
kubernetes-test (v1.25.3)	-     🔗	N/A	See Details
kubernetes-test (v1.24.7)	-     🔗	N/A	See Details
kubernetes-test (v1.23.13)	-     🔗	N/A	See Details

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