Enable default in bash completion
Enable default in bash completion

This adds default options to bash completion, allowing to put filenames
after options like --template-file.

Change-Id: I8881028186f26d8fccb611daabf92ba028ca41a8

tcpcloud/python-heatclient,jasondunsmore/python-heatclient,ecerulm/python-heatclient,varunarya10/python-heatclient,metacloud/python-heatclient,openstack/python-heatclient,varunarya10/python-heatclient,rdo-management/python-heatclient,ecerulm/python-heatclient,jasondunsmore/python-heatclient,metacloud/python-heatclient,tcpcloud/python-heatclient,rdo-management/python-heatclient