Fixed the icmp permission to support all outgoing traffic
Fixed the icmp permission to support all outgoing traffic

Allows us to ping everywhere.
Now, both ping and download via http/https work out of the box

```
ubuntu@ip-192-168-0-80:~$ ssh -i ~/.ssh/amplab-us-east.pem ec2-user@192.168.1.100
The authenticity of host '192.168.1.100 (192.168.1.100)' can't be established.
ECDSA key fingerprint is SHA256:g+7VGAmqYMfn3TSCZVR44YRtLtUJ1FnSgxwRkk5A978.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.100' (ECDSA) to the list of known hosts.

       __|  __|_  )
       _|  (     /   Amazon Linux AMI
      ___|\___|___|

https://aws.amazon.com/amazon-linux-ami/2017.09-release-notes/
[ec2-user@ip-192-168-1-100 ~]$ ping www.google.com
PING www.google.com (216.58.217.68) 56(84) bytes of data.
64 bytes from iad23s41-in-f4.1e100.net (216.58.217.68): icmp_seq=1 ttl=47 time=2.07 ms
64 bytes from iad23s41-in-f68.1e100.net (216.58.217.68): icmp_seq=2 ttl=47 time=1.59 ms
^C
--- www.google.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 1.595/1.833/2.072/0.242 ms
[ec2-user@ip-192-168-1-100 ~]$ wget https://www.nytimes.com
--2017-12-27 08:17:36--  https://www.nytimes.com/
Resolving www.nytimes.com (www.nytimes.com)... 151.101.33.164
Connecting to www.nytimes.com (www.nytimes.com)|151.101.33.164|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 213691 (209K) [text/html]
Saving to: ‘index.html’

index.html            100%[=========================>] 208.68K  --.-KB/s    in 0.01s

2017-12-27 08:17:36 (21.0 MB/s) - ‘index.html’ saved [213691/213691]
```

shankari/e-mission-server,shankari/e-mission-server,e-mission/e-mission-server,e-mission/e-mission-server,e-mission/e-mission-server,shankari/e-mission-server,e-mission/e-mission-server,shankari/e-mission-server