Fixed several issues in the interface state

Fixed:
   * The udev-rules template is not tested
   * Wrong unicode character in the template leads to udev ignoring
     the rule completely
   * The template is unable to be rendered due to absent import
   * udev is not retrigerred with new rules

Change-Id: I134b5e49b883afcc5e34feaaa561d7ca70192796
Closes-Bug: PROD-16649
diff --git a/tests/pillar/network_extended.sls b/tests/pillar/network_extended.sls
index 19587c9..e0e428d 100644
--- a/tests/pillar/network_extended.sls
+++ b/tests/pillar/network_extended.sls
@@ -8,6 +8,7 @@
     hostname: linux
     fqdn: linux.ci.local
     network_manager: false
+    tap_custom_txqueuelen: 10000
     interface:
       eth0:
         enabled: true