Enable magnum dashboard when enable_magnum is yes
Enable magnum dashboard when enable_magnum is yes

Change-Id: I820c61771f0ea8f12946f16908e4b8424ba53704
Depends-On: Iaf599ceea70879b8302ffcdf9615f18007e93134

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible