[Improvement] state/dynamodb - Support optional stream (widdix#328)

[Security] * -Get rid of managed policies (breaking change)

[Improvement] ecs/cluster - Remove unneeded ruby dependencies (now mo…

…ved to Lambda) (widdix#320)

[Bug Fix] * - Fixed missing logs:CreateLogGroup permission (widdix#312)

[New Template] vpc/vpc-endpoint - Generic VPC Endpoints (widdix#234)

[Security] * - Update Amazon Linux 2 to 2.0.20190115 and AL 2 ECS opt…

…imized to 2.0.20190301 (widdix#305)

[Improvement] state/s3 - Add read access via VPC endpoint

improving IAM policy for ECS cluster instances (widdix#298)

Update Lambda functions to node 8.10

* [Improvement] `ecs/cluster` - Update Lambda functions to node 8.10
* [Improvement] `operations/backup-dynamodb-native` - Update Lambda functions to node 8.10
* [Improvement] `security/account-password-policy` - Update Lambda functions to node 8.10
* [Improvement] `state/elasticache-memcached` - Update Lambda functions to node 8.10
* [Improvement] `static-website/lambdaedge-index-document` - Update Lambda functions to node 8.10
* [Improvement] `wordpress/*` - Update Lambda functions to node 8.10

[Security] wordpress/* - Update WordPress to 5.1.1 (widdix#284)