Add a test to retain inner packet TTL if inner packet TTL=1

[vishnureddybadveli]

Added the missed functionality of retaining inner TTL.

[OpenConfigBot]

Pull Request Functional Test Report for #3521 / 8f58ae1

No tests identified for validation.

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[coveralls]

Pull Request Test Coverage Report for Build 11388295421

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This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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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 55.268%

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Totals
Change from base Build 11376427199:	0.0%
Covered Lines:	1983
Relevant Lines:	3588

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💛 - Coveralls

[vishnureddybadveli]

As per vendors there is support to retain inner packet TTL, test case does not describe how exactly it is done byvendor implementation. Test case mentions that match should check for inner packet TTL == 1 but retaining inner TTL is vendor implementation.