ibmcloud: fix import.sh bucket selection

Choosing the first bucket in an instance wil not work if the
first bucket is not in the target region. This PR fixes the
selection logic to choose the first bucket that is in the
target region.

Signed-off-by: Frank Budinsky <frankb@ca.ibm.com>

src/cloud-api-adaptor/ibmcloud/image/import.sh

@@ -66,16 +66,20 @@ fi
 
 [ -n "$endpoint" ] && ibmcloud cos config endpoint-url --url "$endpoint" >/dev/null
 
-if ! ibmcloud cos buckets --output JSON | jq -r '.Buckets[].Name'; then
-    error "Can't find any buckets in $instance"
-fi
-
 if [ -z "$bucket" ]; then
-    bucket=$(ibmcloud cos buckets --output JSON | jq -r '.Buckets[0].Name')
+    for i in $(ibmcloud cos buckets --output JSON | jq -r '.Buckets[].Name'); do
+        if ibmcloud cos bucket-head --bucket $i >/dev/null 2>&1; then
+            bucket=$i
+            break
+        fi
+    done
+    if [ -z "$bucket" ]; then
+        error "Can't find any buckets in target region"
+    fi
+else
+    ibmcloud cos bucket-head --bucket "$bucket" || error "Bucket $bucket not found"
 fi
 
-ibmcloud cos bucket-head --bucket "$bucket" || error "Bucket $bucket not found"
-
 if [ -f ${image_file} ]; then
     file=${image_file}
 else