Description of problem:
When we want to create an image, there is no drop-down list available in the format box, resulting that it's impossible to create an image. 

Version-Release number of selected component (if applicable):
Havana

Expected results:

We shoud see a list of avaible type of images. 

Additional info:

I resolved this by adding this block of text in the /etc/openstack-dashboard/local_settings, right after the OPENSTACK_NEUTRON_NETWORK section : 


# The OPENSTACK_IMAGE_BACKEND settings can be used to customize features
# in the OpenStack Dashboard related to the Image service, such as the list
# of supported image formats.
OPENSTACK_IMAGE_BACKEND = {
    'image_formats': [
        ('', ''),
        ('aki', _('AKI - Amazon Kernel Image')),
        ('ami', _('AMI - Amazon Machine Image')),
        ('ari', _('ARI - Amazon Ramdisk Image')),
        ('iso', _('ISO - Optical Disk Image')),
        ('qcow2', _('QCOW2 - QEMU Emulator')),
        ('raw', _('Raw')),
        ('vdi', _('VDI')),
        ('vhd', _('VHD')),
        ('vmdk', _('VMDK'))
    ]
}