Misc fixes

* Add\fix __virtual__ for modules
  * Remove unneded multiline for repo.sls

Change-Id: I1f8d321b68dfe6a44264b4ddcd6cd0c576938da1

_modules/linux_hosts.py

 
 from jinja2 import Undefined
 
+def __virtual__():
+    return 'linux_hosts'
+
 def fqdn_sort_fn(n1, n2):
     l1 = n1.split('.')
     l2 = n2.split('.')

_modules/linux_netlink.py

 
 import re
 
+def __virtual__():
+    return 'linux_netlink'
 
 def ls(regex):
     """

linux/system/repo.sls

 linux_repo_{{ name }}_key:
         {% set repo_key = salt['hashutil.base64_b64encode'](repo.key) %}
   cmd.run:
-    - name: |
-            echo '{{ repo_key }}' | base64 -d | apt-key add -
+    - name: "echo '{{ repo_key }}' | base64 -d | apt-key add -"
     - require_in:
         {%- if repo.get('default', False) %}
       - file: default_repo_list