[RT-7.9] Update wait times for convergence

[yini101]

Increase gnmi.Watch timeout in verifyBGPPrefixesTelemetry from 30s to 2 minutes to allow sufficient time for initial BGP prefix advertisement over IS-IS loopback sessions to propagate to DUT telemetry.

Increase sleep in enableMultipath (Arista deviation path) from 30s to 60s to ensure EOS fully programs the 3-path ECMP FIB before traffic validation begins, preventing transient packet loss during hardware convergence.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request adjusts timing parameters within the BGP multipath test suite to improve stability. By increasing wait times for telemetry updates and hardware programming, the changes prevent race conditions and transient failures during network convergence.

Highlights

• Telemetry Timeout Extension: Increased the gnmi.Watch timeout from 30 seconds to 2 minutes in verifyBGPPrefixesTelemetry to accommodate BGP prefix advertisement propagation.
• Convergence Delay Adjustment: Extended the sleep duration in enableMultipath from 30 seconds to 60 seconds to ensure Arista EOS fully programs the ECMP FIB before validation.

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[OpenConfigBot]

Pull Request Functional Test Report for #5310 / e8b90be

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Cisco 8000E		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Cisco XRd		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Juniper ncPTX		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Nokia SR Linux		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Openconfig Lemming		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Cisco 8808		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Juniper PTX10008		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop
Nokia 7250 IXR-10e		RT-7.9: BGP ECMP for iBGP with IS-IS protocol nexthop

Help

[gemini-code-assist]

Code Review

This pull request increases the wait times in the BGP multipath test by doubling the time.Sleep duration to 60 seconds after CLI configuration and extending the gnmi.Watch timeout to 2 minutes for prefix telemetry. Note that the use of time.Sleep violates the repository style guide, which recommends using gnmi.Watch with .Await for waiting on conditions. I have no feedback to provide.

[AmrNJ]

/fptest hardware