Re #8365 Fix the XSD of the IDF.

Code/Mantid/instrument/D2B_Definition.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- For help on the notation used to specify an Instrument Definition File see http://www.mantidproject.org/IDF -->
-<instrument name="D2B" valid-from="1900-01-31 23:59:59" valid-to="2100-01-31 23:59:59" 
-last-modified="2013-11-28 14:18:50">
+<instrument  xmlns="http://www.mantidproject.org/IDF/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mantidproject.org/IDF/1.0 Schema/IDFSchema.xsd"
+name="D2B" valid-from="1900-01-31 23:59:59" valid-to="2100-01-31 23:59:59" last-modified="2013-11-28 14:18:50">
   <!-- Author: ricardo.leal@ill.fr -->
   <defaults>
     <length unit="meter" />