Updates to Transceiver-7: zr_inventory_test

[hattikals]

• Corrected the logic to get the opticalComponentName, in accordance with the YANG documentation.
• In the previous logic the code was to get the optical component name by traversing through the parents of the PORT component, this would lead to no results. Hence changed it to, find the OPTICAL_CHANNEL comp first and match its parent against HARDWARE_PORT of the interface.
• Current flow : PORT <-- TRANSCIEVER <-- OPTICAL_CHANNEL

[OpenConfigBot]

Pull Request Functional Test Report for #2892 / 75d69d9186496d752f12d868257c2ed98f5807a9

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Cisco 8000E		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Cisco XRd		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Juniper ncPTX		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Nokia SR Linux		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Openconfig Lemming		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Cisco 8808		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Juniper PTX10008		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming
Nokia 7250 IXR-10e		TRANSCEIVER-7: Telemetry: 400ZR Optics inventory info streaming

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[coveralls]

Pull Request Test Coverage Report for Build 8663296767

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 55.448%

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Totals
Change from base Build 8656729257:	0.0%
Covered Lines:	1949
Relevant Lines:	3515

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💛 - Coveralls

[hattikals]

Recent merge had the similar changes , hence closing this pull.