openvidu-deployment: delete_amis.sh: Different region for each iteration

openvidu-server/deployments/pro/aws/delete_amis.sh

@@ -2,12 +2,12 @@
 set -eu -o pipefail
 
 # Remove the list of AMIs in each region
-export AWS_DEFAULT_REGION=${REGION}
-
 for line in ${AMI_LIST}
 do
 	REGION=$(echo "${line}" | cut -d":" -f1)
 	AMI_ID=$(echo "${line}" | cut -d":" -f2)
+      export AWS_DEFAULT_REGION=${REGION}
+      
       mapfile -t SNAPSHOTS < <(aws ec2 describe-images --image-ids "$AMI_ID" --output text --query 'Images[*].BlockDeviceMappings[*].Ebs.SnapshotId')
       echo "Deregistering $AMI_ID"
 	aws ec2 deregister-image --image-id "${AMI_ID}"