Merge content from university AWS docs

https://docs.gitlab.com/ee/university/high-availability/aws

Merge content from university AWS docs
https://docs.gitlab.com/ee/university/high-availability/aws
7a40204e · Achilleas Pipinellis · cf232bb6 · cf232bb6 · 7a40204e · cf232bb6
Commit 7a40204e authored Sep 24, 2018 by Achilleas Pipinellis
4 changed files
--- a/doc/install/aws/img/associate_subnet_gateway_2.png
+++ b/doc/install/aws/img/associate_subnet_gateway_2.png
--- a/doc/install/aws/img/create_security_group.png
+++ b/doc/install/aws/img/create_security_group.png
--- a/doc/install/aws/img/create_subnet.png
+++ b/doc/install/aws/img/create_subnet.png
--- a/doc/install/aws/index.md
+++ b/doc/install/aws/index.md