e2e: upgrade consul in packer setup to 1.7.3 from 1.6.1

There have been a number of bug fixes and features particularly around
Connect that will help us in Nomad's e2e tests. Upgrade Consul in our
packer builder so e2e can make use of the new version.

e2e/terraform/packer/linux/setup.sh

@@ -10,7 +10,7 @@ sudo chown -R ubuntu:ubuntu /ops/shared
 
 cd /ops
 
-CONSULVERSION=1.6.1
+CONSULVERSION=1.7.3
 CONSULDOWNLOAD=https://releases.hashicorp.com/consul/${CONSULVERSION}/consul_${CONSULVERSION}_linux_amd64.zip
 CONSULCONFIGDIR=/etc/consul.d
 CONSULDIR=/opt/consul

e2e/terraform/packer/windows/install-consul.ps1

@@ -8,7 +8,7 @@ Set-Location C:\opt
 
 Try {
     $releases = "https://releases.hashicorp.com"
-    $version = "1.6.1"
+    $version = "1.7.3"
     $url = "${releases}/consul/${version}/consul_${version}_windows_amd64.zip"
 
     $configDir = "C:\opt\consul.d"