updated the aft route summary check as the await method was returning…

[mastarkey]

the code change from gnmi.get to gnmi.await when we run with gnmi.await the prefix return value is always 0 so changed to gnmi.watch which is allowing us to gather the actual route information.

[OpenConfigBot]

Pull Request Functional Test Report for #3629 / 560e2ae

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Cisco 8000E		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Cisco XRd		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Juniper ncPTX		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Nokia SR Linux		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Openconfig Lemming		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Cisco 8808		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Juniper PTX10008		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary
Nokia 7250 IXR-10e		RT-4.10: AFTs Route Summary RT-4.11: AFTs Route Summary

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