Update storage, versions, and TLS certificates

• Vault v1.9.3
• Consul v1.11.2
• Update expired TLS certificates (thanks @daveyb)
• Prefer local container data storage for Vault and Consul
• Update documentation

Latest Vault and Consul

• Vault 1.9.0, 1.9.1, and 1.9.2
• Consul 1.11.1
• Update documentation

Vault v1.8.2 and Consul v1.10.2

v3.8.2

Merge branch 'devel'

Vault version 1.8.1

v3.8.1

Merge branch 'devel'

Vault 1.8.0 and Consul 1.10.1

• Vault 1.8.0
• Consul 1.10.1
• Update documentation

Vault v1.7.3 and Consul v1.9.7

• Vault v1.7.3
• Consul v1.9.7
• Update documentation

Vault v1.7.2 and Consul v1.9.5

• Vault v1.7.2
• Update documentation

Terraform v0.15.0+ now required

• Require Terraform >= 0.15.0
• Update documentation

Update scripts and and docs

• Update form script
• Update documentation example

Vault version 1.7.0

• Vault v1.7.0
• Consul v1.9.4
• Update documentation