Added ability to enable SETENV in sudoers

Change-Id: Icee295720a5a2425390a1bcd588841897071938e

README.rst

           salt-ops-2nd:
             name: salt-ops
             nopasswd: false
+            setenv: true # Enable sudo -E option
             runas:
             - DBA
             commands:

linux/files/sudoer-users

 # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
 
 {%- for user,spec in users.iteritems() %}
-{{ spec.name|default(user) }} {{ spec.get('hosts', ['ALL'])|join(',') }}=({{ spec.get('runas', ['ALL'])|join(', ') }}) {% if spec.get('nopasswd', True) %}NOPASSWD: {% endif %}{{ spec.get('commands', ['ALL'])|join(', ') }}
+{{ spec.name|default(user) }} {{ spec.get('hosts', ['ALL'])|join(',') }}=({{ spec.get('runas', ['ALL'])|join(', ') }}) {% if spec.get('nopasswd', True) %}NOPASSWD:{% endif %}{% if spec.get('setenv', False) %}SETENV:{% endif %} {{ spec.get('commands', ['ALL'])|join(', ') }}
 {%- endfor %}