wget less verbose

wget is too verbose in devstack logs [1] on image download.

Changing the progress bar style to giga, in order
to be less verbose.

http://logs.openstack.org/73/146573/2/check/
check-tempest-dsvm-full-juno/41ba988/logs/devstacklog.txt.gz#_2015-01-13_11_34_15_330

Change-Id: Ic5304893f4c97c50e7a2f29ad5cd77dba3d5a9dd
diff --git a/functions b/functions
index c7a3b9d..12be160 100644
--- a/functions
+++ b/functions
@@ -42,7 +42,7 @@
     if [[ $image_url != file* ]]; then
         # Downloads the image (uec ami+akistyle), then extracts it.
         if [[ ! -f $FILES/$image_fname || "$(stat -c "%s" $FILES/$image_fname)" = "0" ]]; then
-            wget -c $image_url -O $FILES/$image_fname
+            wget --progress=dot:giga -c $image_url -O $FILES/$image_fname
             if [[ $? -ne 0 ]]; then
                 echo "Not found: $image_url"
                 return
@@ -116,7 +116,7 @@
             if [[ $flat_url != file* ]]; then
                 if [[ ! -f $FILES/$flat_fname || \
                 "$(stat -c "%s" $FILES/$flat_fname)" = "0" ]]; then
-                    wget -c $flat_url -O $FILES/$flat_fname
+                    wget --progress=dot:giga -c $flat_url -O $FILES/$flat_fname
                 fi
                 image="$FILES/${flat_fname}"
             else