Aerospike 3.8.1 release

OPS-931, Aerospike 3.8.1 release

Aerospike 3.7.5 release

OPS-870, 3.7.5 release

Aerospike 3.7.4 release

OPS-825, 3.7.4 update, with VPC hostnames check

Aerospike 3.7.3 release

OPS-796, 3.7.3 release, update default to t2.large to support ap-ne-2

Aerospike 3.7.2 release

Merge pull request #13 from rguo-aerospike/aws

New AWS marketplace CFT