We have two uve libraries namely uve and statsuve. VRouter UVE is currently being sent as part of statsuve library. Made changes to send VRouter UVE as part of uve library. Anybody who links only with UVE library should be able to send VRouter UVE (currently TOR agent is one example which links only with uve library)

Also moved Vrouter-agent cpu-stats UVE to uve library from statsuve library.

Also made test_icmpv6 as flaky.
Closes-Bug: 1392312

Change-Id: I10b76f532945f8dc3f35ba177ae273c24cbaab7a