TE-16.2 Encap Frr Test - fix for using l2 rules and sequenceID

[suredhar]

1. Added back code to use deviation for default class by using L2 rules.
2. Added a function to generate sequence IDs off a base value to avoid out-of-order rule sequences in a policy-map configuration.
3. Added a deviation for the gRIBI IPv4 route. The device does not support a MAC address, only a next-hop entry.
4. Added the following deviations: -> gribi_mac_override_with_static_arp -> interface_ref_interface_id_format -> pf_require_match_default_rule

[OpenConfigBot]

Pull Request Functional Test Report for #2889 / d751301ddeb409570b854dffcd820e99252b4147

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		TE-16.2: encapsulation FRR scenarios
Cisco 8000E		TE-16.2: encapsulation FRR scenarios
Cisco XRd		TE-16.2: encapsulation FRR scenarios
Juniper ncPTX		TE-16.2: encapsulation FRR scenarios
Nokia SR Linux		TE-16.2: encapsulation FRR scenarios
Openconfig Lemming		TE-16.2: encapsulation FRR scenarios

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		TE-16.2: encapsulation FRR scenarios
Cisco 8808		TE-16.2: encapsulation FRR scenarios
Juniper PTX10008		TE-16.2: encapsulation FRR scenarios
Nokia 7250 IXR-10e		TE-16.2: encapsulation FRR scenarios

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[coveralls]

Pull Request Test Coverage Report for Build 9227587216

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 9226667784:	0.0%
Covered Lines:	1983
Relevant Lines:	3573

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