smoketest: ospf: T4739: add timeout in ldp test (backport #3454)

[mergify]

Change Summary

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T4739

Related PR(s)

Component(s) name

Proposed changes

How to test

Smoketest result

test_ospf_01_defaults (__main__.TestProtocolsOSPF.test_ospf_01_defaults) ... ok
test_ospf_02_simple (__main__.TestProtocolsOSPF.test_ospf_02_simple) ... ok
test_ospf_03_access_list (__main__.TestProtocolsOSPF.test_ospf_03_access_list) ... ok
test_ospf_04_default_originate (__main__.TestProtocolsOSPF.test_ospf_04_default_originate) ... ok
test_ospf_05_options (__main__.TestProtocolsOSPF.test_ospf_05_options) ... ok
test_ospf_06_neighbor (__main__.TestProtocolsOSPF.test_ospf_06_neighbor) ... ok
test_ospf_07_redistribute (__main__.TestProtocolsOSPF.test_ospf_07_redistribute) ... ok
test_ospf_08_virtual_link (__main__.TestProtocolsOSPF.test_ospf_08_virtual_link) ... ok
test_ospf_09_interface_configuration (__main__.TestProtocolsOSPF.test_ospf_09_interface_configuration) ... ok
test_ospf_11_interface_area (__main__.TestProtocolsOSPF.test_ospf_11_interface_area) ...
Can not use OSPF interface area and area network configuration at the
same time!

ok
test_ospf_12_vrfs (__main__.TestProtocolsOSPF.test_ospf_12_vrfs) ... ok
test_ospf_13_export_list (__main__.TestProtocolsOSPF.test_ospf_13_export_list) ... ok
test_ospf_14_segment_routing_configuration (__main__.TestProtocolsOSPF.test_ospf_14_segment_routing_configuration) ... ok
test_ospf_15_ldp_sync (__main__.TestProtocolsOSPF.test_ospf_15_ldp_sync) ... ok
test_ospf_16_graceful_restart (__main__.TestProtocolsOSPF.test_ospf_16_graceful_restart) ... ok
test_ospf_17_duplicate_area_network (__main__.TestProtocolsOSPF.test_ospf_17_duplicate_area_network) ...
Network "10.0.0.0/8" already defined in different area!

ok

----------------------------------------------------------------------
Ran 16 tests in 82.265s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

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This is an automatic backport of pull request #3454 done by [Mergify](https://mergify.com).