prepare 1.5.0 RC1

changes.xml

@@ -37,7 +37,7 @@
     <title>Apache AntUnit</title>
   </properties>
 
-  <release version="1.5" date="unreleased">
+  <release version="1.5.0" date="unreleased">
     <action type="add">
       Allow the AntUnit task to use a different classloader when
       running the test by means of a nested classpath or a

version.properties

@@ -12,4 +12,4 @@
 #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
-artifact.version=1.5alpha
+artifact.version=1.5.0