Remove some deprecation warnings

Signed-off-by: Edward Zhang <zhuadl@cn.ibm.com>
Skip creating existing S3 buckets
Prompt for deletion of each vpc

Prompt for deletion of each vpc so that default vpc can be kept
Update db instance class to use "db.m1.small"

db.m1.small allows more than five connections
Remove migration comment

Signed-off-by: Edward Zhang <zhuadl@cn.ibm.com>
Remove extra space

Signed-off-by: Edward Zhang <zhuadl@cn.ibm.com>
Add missing tests for VPC deletion confirmation

Signed-off-by: Edward Zhang <zhuadl@cn.ibm.com>