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)

[Security] ecs/cluster - Update ECS-optimized Amazon Linux 2 to 2.0.2…

…0190301

[Bug Fix] security/account-password-policy - Boolean values parsing w…

…as broken

[Improvement] * - Use UpdateReplacePolicy to create a snapshot if the…

… data of CloudFormation replaces the resource (widdix#271)

[Security] ecs/cluster - Update Amazon ECS-Optimized Amazon Linux 2 A…

…MI to 20190204 (widdix#270)

Fargate service with Cloud Map support (widdix#264)

[New Template] fargate/service-cloudmap - Fargate with Cloud Map
[New Template] vpc/cloudmap-private - Private Cloud Map namespace
[Improvement] fargate/service-* - Added parameter for Docker command

[Security] ecs/cluster - Update Amazon Linux 2 (optimized for ECS) to…

… 2.0.20190118

update docs

The string substitution is not possible in codepipeline so we have to…

…split the env into two parameters (widdix#257)