Don't start the agent on boot

This will be started by an SSM action run by a lifecycle hook to enable warm pool

Author: keithduncan

packer/linux/conf/bin/bk-install-elastic-stack.sh

@@ -214,7 +214,6 @@ if ! docker ps ; then
 fi
 
 systemctl enable "buildkite-agent"
-systemctl start "buildkite-agent"
 
 # let the stack know that this host has been initialized successfully
 /opt/aws/bin/cfn-signal \

packer/windows/conf/bin/bk-install-elastic-stack.ps1

@@ -210,8 +210,6 @@ If ($lastexitcode -ne 0) { Exit $lastexitcode }
 nssm set buildkite-agent AppRestartDelay 5000
 If ($lastexitcode -ne 0) { Exit $lastexitcode }
 
-Restart-Service buildkite-agent
-
 # renable debug tracing
 Set-PSDebug -Trace 2