Unify netty dependencies to version 4.0.24.Final

Update netty dependencies to version 4.0.24,
remove obsolete version netty dependency from ovsdb
and brain subprojects, introduce infinispan dependency
in midonet-utils for functionality that no longer
belongs to netty.

Change-Id: I743266da14ce5c6cab6ac51f5cccd50d8f4f9390
Signed-off-by: Ernest Artiaga <ernest@midokura.com>
Merge "Unify netty dependencies to version 4.0.24.Final"