[ifmap-server] Update {owner,group}ship for ifmap config

Mentioned by Edouard, the publisher.properties config must be writeable
by the irond user (contrail).

(cherry picked from commit c4716f708d79452a88313513d686dbac704406fb)
[upstart] Add pidfile on all daemons

(cherry picked from commit 0af582e17d843a0f86e8734878bf493725cdab07)

Conflicts:
	debian/contrail/debian/contrail-dns.contrail-named.upstart
debian maintainer script refactoring

This commit handle a little bug on packages un-install (if two contrail
package are installed on the same node).
Install and remove are now also standardized, and a missing rm script for
contrail-dns was added.

(cherry picked from commit df47730327313ca061c8978077b33feb28225f1d)

Conflicts:
	debian/contrail/debian/contrail-dns.postinst
	debian/contrail/debian/contrail-dns.postrm