[Improvement] wordpress/ - Update WordPress to 5.4 (widdix#417)

[Improvement] ec2/al2-mutable-* - Improve unified CW agent handling

[Bug Fix] jenkins/* - Increase creation timeout to support regions fa…

…r away from Jenkins mirrors (closes widdix#399)

[Bug Fix] ec2/al2-mutable-* - Fix CloudWatch Unified Agent config

[Improvement] * - Update Lambda functions to Node 12 (widdix#397)

[Improvement] state/elasticache-redis - Make the number of shards and…

… replicas configurable (widdix#395)

[New Template] ec2/al2-managed - Amazon Linux 2 (managed) (widdix#377)

[New Template] ec2/al2-mutable-private - Amazon Linux 2 (mutable, private)
[New Template] ec2/al2-mutable-public - Amazon Linux 2 (mutable, public)

Deprecation Warning: ec2/ec2-auto-recovery

[Security] ecs/cluster - Update ECS optimized Amazon Linux 2 to 20191…

…212 (widdix#379)

[Security] * - Update Amazon Linux 2 to 20191116 (widdix#374)

fix version placeholder