SGF-858 - Replace all cache.xml document schema declarations referring to the DTD to use the XSD.

src/test/resources/cache-with-declarable.xml

@@ -1,6 +1,9 @@
-<?xml version="1.0"?>
-<!DOCTYPE cache PUBLIC "-//GemStone Systems, Inc.//GemFire Declarative Caching 8.0//EN" "http://www.gemstone.com/dtd/cache8_0.dtd">
-<cache>
+<?xml version="1.0" encoding="UTF-8"?>
+<cache xmlns="http://geode.apache.org/schema/cache"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://geode.apache.org/schema/cache http://geode.apache.org/schema/cache/cache-1.0.xsd"
+       version="1.0">
+
   <region name="Example">
     <region-attributes data-policy="normal">
       <cache-loader>
@@ -8,4 +11,5 @@
       </cache-loader>
     </region-attributes>
   </region>
+
 </cache>