Update devstack plugin for dependent packages
Update devstack plugin for dependent packages

Recent changes to the gate base images [1] removed a package
neutron requires (netcat-openbsd). This patch installs the
required package.

[1] https://review.openstack.org/#/c/292573

Closes-bug: #1558397

Change-Id: I4041478ca09bd124827782774b8520908ef07be0

wolverineav/neutron,bigswitch/neutron,openstack/neutron,igor-toga/local-snat,klmitch/neutron,wolverineav/neutron,openstack/neutron,noironetworks/neutron,cloudbase/neutron,huntxu/neutron,cloudbase/neutron,mahak/neutron,sebrandon1/neutron,mahak/neutron,klmitch/neutron,mahak/neutron,MaximNevrov/neutron,bigswitch/neutron,sebrandon1/neutron,eayunstack/neutron,openstack/neutron,noironetworks/neutron,huntxu/neutron,MaximNevrov/neutron,eayunstack/neutron,igor-toga/local-snat