Rename checkstyle property to avoid gump version

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1619430 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -1047,10 +1047,10 @@ NOTE:
 <!-- =================================================================== -->
 <!-- Checkstyle                                                          -->
 <!-- =================================================================== -->
-  <property name="checkstyle.location" value="${lib-tools}/checkstyle-5.5-all.jar" />
+  <property name="checkstyle.fop.location" value="${lib-tools}/checkstyle-5.5-all.jar" />
   <property name="checkstyle.config" value="${basedir}/checkstyle-5.5.xml" />
   <path id="checkstyle-classpath">
-    <pathelement location="${checkstyle.location}"/>
+    <pathelement location="${checkstyle.fop.location}"/>
   </path>
   <condition property="checkstyle.avail">
     <and>
@@ -1062,7 +1062,7 @@ NOTE:
   </condition>
   <target name="checkstyle-avail" unless="checkstyle.avail">
     <echo message="Checkstyle support NOT present. Please download it from http://checkstyle.sf.net/ and"/>
-    <echo message="... please provide ${checkstyle.location}"/>
+    <echo message="... please provide ${checkstyle.fop.location}"/>
     <echo message="... please provide ${checkstyle.config}"/>
   </target>
   <target name="checkstyle" depends="package, checkstyle-avail" if="checkstyle.avail" description="Runs Checkstyle for a code quality report">