puppet-php

When the pear package name is defined based on `$facter['os']['family']`. The problem is that Amazon Linux has 'RedHat' as os family.
I set an `if` before case searching for 'Amazon' in `$facter['os']['name']` based on the output of the facter command on Amazon instances:
```shell
$ facter os
{
  architecture => "x86_64",
  family => "RedHat",
  hardware => "x86_64",
  name => "Amazon",
  release => {
    full => "2017.09",
    major => "2017",
    minor => "09"
  },
  selinux => {
    enabled => false
  }
}
```