One in glance::backend::swift is redundant because
glance::backend::multistore::swift already takes care of
swiftclient.
Also we don't have to install the client when only common default
values are set.
Change-Id: I40cb9274cb802c7dac0f34ee9f5727695c8a205b
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>
2501b49bca