Copy static files for packaged installs

Packaged installs result in tuskar-ui compressed static files being
placed in /var/www/horizon/static/dashboard, alongside horizon static
files.  We need to copy them over to
/usr/share/openstack-dashboard/static/dashboard

Change-Id: I369cba710c01ee09584d6f3de1c9aa7195dfcb69
Merge "Copy static files for packaged installs"