acl-plugin: VPP-1239: acl-as-a-service does not match IPv6 packets, works only in...

In process of extracting the matching out of the ACL plugin internals,
a couple of pieces setting the miscellaneout fields in the 5tuple structure
did not make it, so they are initialized to zeroes. Move the assignments
to the right place to make both traffic acls and acl-as-a-service working.

Change-Id: I66a7540a13b05113b599f0541999a18fad60385d
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
(cherry picked from commit d3b96ef0d75889f09dc51efb89e5123cdbe7ffe8)