Add namespace declaration to all poms

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@354735 13f79535-47bb-0310-9956-ffa450edef68

examples/project.xml

@@ -18,7 +18,8 @@
  -->
 
 
-<project>
+<project xmlns="http://maven.apache.org/POM/3.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/3.0.0 http://maven.apache.org/maven-v3_0_0.xsd">
   <!-- the version of maven's project object model -->
 
   <pomVersion>3</pomVersion>