Bugfix: ping6 to interface IP of remote leaf doesn't work

Instead of early return, simply ignore link-local IP matching if interface MAC is not configured (e.g. spine port)

Piggybacked in this commit:
    - Refactor the ICMPv6 handler

Change-Id: I44e4daac067262b63e6726b4b4d7e3426e0f7fdb
1 file changed
tree: 863aec4472d9d3ce4103cafd9cd8c485a33b0540
  1. BUCK
  2. app.xml
  3. features.xml
  4. pom.xml
  5. src/