Improve display of QueryParams in ec2QueryDebug.
Add rdsQueryDebug.
Add DescribeDBSnapshots.
Add CreateDBSnapshot.
Add DeleteDBSnapshot.
Add a test case for DescribeDBInstances.
Add DBSnapshot module into cabal file.
Add a test case for DescribeDBSnapshot.
Snapshotを消すテストケースが通るのにも関わらず消えていない