Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Adding vpc_subnet_id to allow for t2 instancds

Update ansible-provision.sh

Taking out verbose mode

taking out diff mode
Merge pull request #1275 from edx/han/aws-t2-instances

Adding vpc_subnet_id to allow for t2 instances