Upgrade to Gradle 1.0-rc1

- Fix deprecation warnings about dynamic properties; favor use of
   "extra properties extensions" per [1]

 - Certain such deprecations are still issued due to violations within
   the docbook-reference plugin. These will be fixed in an upcoming
   revision of the plugin, at which point spring-framework will upgrade
   to depend on it and these warnings will be eliminated

[1] http://gradle.org/docs/current/dsl/org.gradle.api.plugins.ExtraPropertiesExtension.html

Issue: SPR-9327

spring-oxm/oxm.gradle

@@ -13,15 +13,15 @@ dependencies {
     jibx "bcel:bcel:5.1"
 }
 
-genSourcesDir = "${buildDir}/generated-sources"
-flightSchema = "${projectDir}/src/test/resources/org/springframework/oxm/flight.xsd"
+ext.genSourcesDir = "${buildDir}/generated-sources"
+ext.flightSchema = "${projectDir}/src/test/resources/org/springframework/oxm/flight.xsd"
 
 task genCastor {
-    orderSchema = "${projectDir}/src/test/resources/org/springframework/oxm/order.xsd"
-    castorBuilderProperties = "${projectDir}/src/test/castor/castorbuilder.properties"
+    def orderSchema = "${projectDir}/src/test/resources/org/springframework/oxm/order.xsd"
+    def castorBuilderProperties = "${projectDir}/src/test/castor/castorbuilder.properties"
 
-    sourcesDir = "${genSourcesDir}/castor"
-    classesDir = "${buildDir}/classes/castor"
+    ext.sourcesDir = "${genSourcesDir}/castor"
+    ext.classesDir = "${buildDir}/classes/castor"
 
     inputs.files flightSchema, orderSchema, castorBuilderProperties
     outputs.dir classesDir
@@ -56,8 +56,8 @@ task genCastor {
 }
 
 task genJaxb {
-    sourcesDir = "${genSourcesDir}/jaxb"
-    classesDir = "${buildDir}/classes/jaxb"
+    ext.sourcesDir = "${genSourcesDir}/jaxb"
+    ext.classesDir = "${buildDir}/classes/jaxb"
 
     inputs.files flightSchema
     outputs.dir classesDir
@@ -92,7 +92,7 @@ task genJaxb {
 }
 
 task genXmlbeans {
-    classesDir = "${buildDir}/classes/xmlbeans"
+    ext.classesDir = "${buildDir}/classes/xmlbeans"
 
     inputs.files flightSchema
     outputs.dir classesDir
@@ -112,7 +112,7 @@ task genXmlbeans {
 
 // add jibx binding to the normal test compilation process
 compileTestJava {
-    bindingXml = "${projectDir}/src/test/resources/org/springframework/oxm/jibx/binding.xml"
+    def bindingXml = "${projectDir}/src/test/resources/org/springframework/oxm/jibx/binding.xml"
 
     doLast() {
         project.ant {