Don't reinstall package just after installing.
Don't reinstall package just after installing.

Boolean logic used in install_package was wrong:
on nominal flow packages were actually installed twice.
This should fix it.

Change-Id: Ia465414936b272d04523a11f83d6ded378fe1daf
Closes-Bug: #1518544

avvocatodemarchis/devstack,bswartz/devstack,bigswitch/devstack,samgoon/devstack,samgoon/devstack,group-policy/devstack,nawawi/openstack,dtroyer/devstack,Mahito/devstack,Mahito/devstack,dirkmueller/devstack,group-policy/devstack,avvocatodemarchis/devstack,mssumanth/devstack,dtroyer/devstack,noironetworks/devstack,openstack-dev/devstack,noironetworks/devstack,openstack-dev/devstack,richliu/devstack,nawawi/openstack,dirkmueller/devstack,richliu/devstack,bswartz/devstack,mssumanth/devstack,bigswitch/devstack