contrail-control and contrail-dns break on vrouters with fqdn over 50 characters

[Slobodan Blatnjak]

The vrouter connection to the controllers will break if the vrouter has a long fqdn with contrail 3.2.1
Centos 7.3

Working config: 50 character fqdn:
# hostname centos-vrouter.abcdefghi.abcdefghi.abcdefghi.abcd
# service supervisor-vrouter restart
# contrail-status Thu Mar 16 12:30:14 2017
== Contrail vRouter ==
supervisor-vrouter: active
contrail-vrouter-agent active
contrail-vrouter-nodemgr active

Breaking control-dns at 51 character fqdn hostname for vrouter:

# hostname centos-vrouter.abcdefghi.abcdefghi.abcdefghi.abcde
# service supervisor-vrouter restart
# contrail-status Thu Mar 16 12:27:26 2017
== Contrail vRouter ==
supervisor-vrouter: active
contrail-vrouter-agent active (XMPP:dns-server:10.41.0.16, XMPP:dns-server:10.41.0.17 connection down)
contrail-vrouter-nodemgr active

example breaking controller traffic and dns at 55 characters:

# hostname centos-vrouter.abcdefghi.abcdefghi.abcdefghi.abcdefghi
# service supervisor-vrouter restart
# contrail-status Thu Mar 16 12:22:59 2017
== Contrail vRouter ==
supervisor-vrouter: active
contrail-vrouter-agent initializing (XMPP:control-node:10.41.0.16, XMPP:control-node:10.41.0.17, XMPP:
dns-server:10.41.0.16, XMPP:dns-server:10.41.0.17 connection down)
contrail-vrouter-nodemgr active