api: Refactor and move s3 to api.command.admin.storage

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
api: Refactor move storagepool apis to storage pkg

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
CLOUDSTACK-212: Move api/test pkg to org.apache.cloudstack

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>