No ssh in rhel AMI created by Packer

install.sh

#!/bin/bash -eux

sudo mv /tmp/symg /opt/symg

sudo echo "java -Dsymbol.generator.localhost=false -jar /opt/symg/symbol-generator.jar" >> /etc/rc.d/rc.local

java.sh

#!/bin/bash -eux

# Install Java 7
sudo rpm -Uvh /tmp/jdk-linux-x64.rpm
rm -f /tmp/jdk-linux-x64.*

packer.json

{
  "variables": {
    "aws_access_key": null,
    "aws_secret_key": null,
    "source_ami": null,
    "region": null,
    "vpc_id": null,
    "subnet_id": null,
    "security_group_id": null,
    "timestamp": null,
    "svn_id": "n/a",
    "ahp_id": "n/a",
    "project_root": "n/a"
  },
  "builders": [
    {
      "type": "amazon-ebs",
      "region": "{{ user `region` }}",
      "source_ami": "{{ user `source_ami` }}",
      "instance_type": "t1.micro",
      "ssh_username": "root",
      "associate_public_ip_address": "true",
      "access_key": "{{ user `aws_access_key` }}",
      "secret_key": "{{ user `aws_secret_key` }}",
      "vpc_id": "{{ user `vpc_id` }}",
      "subnet_id": "{{ user `subnet_id` }}",
      "security_group_id": "{{ user `security_group_id` }}",
      "ami_name": "ami-exp-symg-{{user `timestamp`}}",
      "tags": {
        "Name": "ami-exp-symg",
        "Timestamp": "{{user `timestamp`}}",
        "SVN Revision": "{{user `svn_id`}}",
        "AHP Build Life": "{{user `ahp_id`}}",
        "AHP URL": "http://wv-ahpserver.wv.mentorg.com:8080/tasks/project/BuildLifeTasks/viewBuildLife?buildLifeId={{user `ahp_id`}}"
      }
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "{{user `project_root`}}/dependencies/java/jdk-linux-x64.rpm",
      "destination": "/tmp/jdk-linux-x64.rpm"
    },
    {
      "type": "shell",
      "script": "java.sh"
    }, 
    {
      "type": "file",
      "source": "./deploy/",
      "destination": "/tmp/symg"
    },
    {
      "type": "shell",
      "script": "install.sh"
    }
  ]
}

us-west-1.json

{
  "source_ami": "ami-c4aeb581",
  "region": "us-west-1",
  "vpc_id": "vpc-11817574",
  "subnet_id": "subnet-be1e19f8",
  "security_group_id": "sg-e27ac187"
}