Add NetworkPolicy manifests to defend pods

[JossWhittle]

https://kubernetes.io/docs/concepts/services-networking/network-policies/

• Web pod

  • Ingress from Controller pod and through the Web ingress object
  • Egress to Guacd pod, Database pods, and to external LDAP server url

• Database pods

  • Ingress from Controller pod and Web pod
  • Egress to no one

• Guacd pod

  • Ingress from Web pod
  • Egress to the virtual machines... Might need to leave this open to all at first and try locking it down later.

• Controller pod

  • Ingress from no one
  • Egress to Web pod, Database pods, and to external LDAP server url