Allow boolean values to pass through to glance
Allow boolean values to pass through to glance

When uploading an image it is necessary to set flags such as
protected=True. Currently the code blindly converts everything to a
string leading to errors. This change will allow booleans to pass
through unmolested.

Change-Id: Ib0e230cf9c52500973ac2e7636f3dc607c1e8089

openstack/python-openstacksdk,dtroyer/python-openstacksdk,openstack-infra/shade,openstack/python-openstacksdk,stackforge/python-openstacksdk,openstack-infra/shade,stackforge/python-openstacksdk,dtroyer/python-openstacksdk