DP-1.3 Adding required scheduler config before binding it to an Interface

[charantejag504]

1. In DP-1.3, Adding required scheduler config before binding it to an Interface.
2. Removing deviations state_path_unsupported and drop_weight_leaves_unsupported.
3. Updated README to match the new README file conventions.

[OpenConfigBot]

Pull Request Functional Test Report for #2671 / b03cd23701cec237e668c0a5ab821ad37104d3fa

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		DP-1.3: QoS ECN feature config
Cisco 8000E		DP-1.3: QoS ECN feature config
Cisco XRd		DP-1.3: QoS ECN feature config
Juniper ncPTX		DP-1.3: QoS ECN feature config
Nokia SR Linux		DP-1.3: QoS ECN feature config
Openconfig Lemming		DP-1.3: QoS ECN feature config

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		DP-1.3: QoS ECN feature config
Cisco 8808		DP-1.3: QoS ECN feature config
Juniper PTX10008		DP-1.3: QoS ECN feature config
Nokia 7250 IXR-10e		DP-1.3: QoS ECN feature config

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[coveralls]

Pull Request Test Coverage Report for Build 10115942896

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 55.5%

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Totals
Change from base Build 10114293429:	0.0%
Covered Lines:	1983
Relevant Lines:	3573

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💛 - Coveralls