[orchagent] Voq system ports implementation#1

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vganesan-nokia wants to merge 6 commits intomasterfrom voq1

Commits on Aug 9, 2020

[swss]voq changes
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Commits on Aug 11, 2020

[swss]Inband interface for any port
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Commits on Aug 12, 2020

[intfsorch, neighorch]Fix to get system port alias from port
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Commits on Aug 18, 2020

[voq inband]Inband config support
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[mock tests]redis voq instance host ip address change
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Commits on Aug 28, 2020

[voq]Removed unwanted code.
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