Add junit 4.5 lib

nbproject/project.properties

+application.title=util
+application.vendor=chris
 build.classes.dir=${build.dir}/classes
 build.classes.excludes=**/*.java,**/*.form
 # This directory is removed when the project is cleaned:
 dist.jar=${dist.dir}/util.jar
 dist.javadoc.dir=${dist.dir}/javadoc
 excludes=
+file.reference.junit-4.5.jar=lib/junit-4.5.jar
 includes=**
 jar.compress=false
 javac.classpath=
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}:\
-    ${libs.junit_4.classpath}
+    ${file.reference.junit-4.5.jar}
 javadoc.additionalparam=
 javadoc.author=false
 javadoc.encoding=${source.encoding}