Add create spot functionality to instance_manager.
Update to latest aws-sdk to fix issues like https://github.com/aws/aws-sdk-ruby/pull/249
Fix syntax & time format errors
Add unit test
Update everything to aws-sdk-1.32.0
Update change log
Fix gem dependancies
Revert "Fix gem dependancies"

This reverts commit c2c2500350a9399cc3a96f65484f07f60091de81.
bundle update --source aws-sdk
Replace instance_double with double to prevent incorrect “AWS::RDS::Client does not implement: delete_db_subnet_group” errors
Change double back to instance_double with updated class name

Signed-off-by: Matthew Boedicker <mboedicker@pivotallabs.com>
Signed-off-by: Adam Stegman <astegman@pivotallabs.com>
Allow registry port to be customized for openstack builds

Signed-off-by: Adam Stegman <astegman@pivotallabs.com>