Move Java Versions to gradle.properties

gradle/java.gradle

@@ -11,19 +11,6 @@ group = 'org.springframework.session'
 sourceCompatibility = 1.5
 targetCompatibility = 1.5
 
-ext.commonsPoolVersion = '2.2'
-ext.embeddedRedisVersion = '0.2'
-ext.gebVersion = '0.10.0'
-ext.groovyVersion = '2.3.8'
-ext.jedisVersion = '2.4.1'
-ext.jstlVersion = '1.2.1'
-ext.seleniumVersion = '2.44.0'
-ext.servletApiVersion = '3.0.1'
-ext.spockVersion = '0.7-groovy-2.0'
-ext.springDataRedisVersion = '1.3.0.RELEASE'
-ext.springSecurityVersion = '4.0.0.RC1'
-ext.springVersion = '4.1.3.RELEASE'
-
 ext.spockDependencies = [
         dependencies.create("org.spockframework:spock-core:$spockVersion") {
             exclude group: 'junit', module: 'junit-dep'