Disable the Trace method (#8195)

The Trace method is enabled because of the Apache module, but it is not the
default in Debian, and it should not be enabled, for more information see the
following:

https://www.kb.cert.org/vuls/id/867593

Change-Id: I06a06ae679dbf7049f26a017125b61e5e38f6268

puppet/modules/site_apache/files/conf.d/security

@@ -45,8 +45,8 @@ ServerSignature Off
 #
 # Set to one of:  On | Off | extended
 #
-#TraceEnable Off
-TraceEnable On
+TraceEnable Off
+#TraceEnable On
 
 # Setting this header will prevent other sites from embedding pages from this
 # site as frames. This defends against clickjacking attacks.