Success for editing site.pp file, on failure.

[Biju Varghese]

The customer would use the curl command to build the build server and install all packages necessary.

Incase the script is unable to download all the required files then we should not get a sucess message to edit the site.pp file.
The message in being printed as the part of the script whenever you run the curl command.

Err http://apt.ctocllab.cisco.com grizzly-proposed/main Sources
  502 Cannot Connect
Err http://apt.ctocllab.cisco.com grizzly-proposed/main amd64 Packages
  502 Cannot Connect
Err http://apt.ctocllab.cisco.com grizzly-proposed/main i386 Packages
  502 Cannot Connect
Ign http://apt.ctocllab.cisco.com grizzly-proposed/main Translation-en_IN
W: Failed to fetch http://apt.ctocllab.cisco.com/repos/n1k-test/dists/grizzly-proposed/main/source/Sources 502 Cannot Connect

W: Failed to fetch http://apt.ctocllab.cisco.com/repos/n1k-test/dists/grizzly-proposed/main/binary-amd64/Packages 502 Cannot Connect

E: Some index files failed to download. They have been ignored, or old ones used instead.
Reading state information... Done
E: Unable to locate package puppet-cinder
E: Unable to locate package puppet-cobbler
E: Unable to locate package puppet-dnsmasq
E: Unable to locate package puppet-glance
E: Unable to locate package puppet-graphite
E: Unable to locate package puppet-horizon
E: Unable to locate package puppet-keystone
E: Unable to locate package puppet-mysql
E: Unable to locate package puppet-nova
E: Unable to locate package puppet-ntp
E: Unable to locate package puppet-openstack
E: Unable to locate package puppet-pip
E: Unable to locate package puppet-puppet
E: Unable to locate package puppet-quantum
E: Unable to locate package puppet-rabbitmq
E: Unable to locate package puppet-ssh
E: Unable to locate package puppet-stdlib
E: Unable to locate package puppet-n1k-vsm
E: Unable to locate package puppet-n1k-vem

SUCCESS!!!!

We should make sure that the success message is printed only if all the required agents are installed.