Support ConfigDB neighbor configuration, introduce nbrmgr daemon#693

Merged

prsunny merged 6 commits intosonic-net:masterfrom

Nov 28, 2018

Commits on Nov 16, 2018

Introduce neighbor manager daemon
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committed

Commits on Nov 17, 2018

Corrected the ConfigDB name
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Commits on Nov 19, 2018

Merge remote-tracking branch 'upstream/master' into nbrmgr
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Commits on Nov 20, 2018

Commits on Nov 21, 2018

Check invalid mac configuration, catch exception
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committed