Fixing Puppet installation

To start I used the following command:
```
make virtualbox/debian77
```
Further I used a Makefile.local to install Puppet as my CM:
```
CM := puppet
CM_VERSION := 3.7.3-1puppetlabs1
UPDATE := true
HEADLESS := true
```
and I got the following output:
```
==> virtualbox-iso: Provisioning with shell script: script/cmtool.sh
    virtualbox-iso: ==> Installing Puppet
    virtualbox-iso: /tmp/script.sh: line 70: /etc/lsb-release: No such file or directory
    virtualbox-iso: --2014-12-02 07:20:54--  http://apt.puppetlabs.com/puppetlabs-release-.deb
    virtualbox-iso: Resolving apt.puppetlabs.com (apt.puppetlabs.com)... 198.58.114.168, 2600:3c00::f03c:91ff:fe69:6bf0
    virtualbox-iso: Connecting to apt.puppetlabs.com (apt.puppetlabs.com)|198.58.114.168|:80... connected.
    virtualbox-iso: HTTP request sent, awaiting response... 404 Not Found
    virtualbox-iso: 2014-12-02 07:20:54 ERROR 404: Not Found.
    virtualbox-iso:
    virtualbox-iso: dpkg: error processing puppetlabs-release-.deb (--install):
    virtualbox-iso: cannot access archive: No such file or directory
    virtualbox-iso: Errors were encountered while processing:
    virtualbox-iso: puppetlabs-release-.deb
    virtualbox-iso: Installing Puppet version 3.7.3-1puppetlabs1
    virtualbox-iso: Reading package lists... Done
    virtualbox-iso: Building dependency tree
    virtualbox-iso: Reading state information... Done
    virtualbox-iso: E: Version '3.7.3-1puppetlabs1' for 'puppet-common' was not found
    virtualbox-iso: E: Version '3.7.3-1puppetlabs1' for 'puppet' was not found
```
Probably there's an error occuring resolving the variable DEB_NAME. `/etc/lsb-release` is not available on Debian that's why the variable stays empty and dpkg is trying to install a package which doesn't exist.
To conclude you should do an update, too.