Move JRuby dependency below Joda

JRuby includes a copy of joda classes with the same package names.
This commit changes the order of the loaded jars to load the original
joda classes first.

build.gradle

@@ -262,12 +262,12 @@ project('spring-context') {
         }
         compile("org.beanshell:bsh:2.0b4", optional)
         compile("org.codehaus.groovy:groovy-all:1.6.3", optional)
-        compile("org.jruby:jruby:1.4.0", optional)
         compile("org.hibernate:hibernate-validator:4.2.0.Final") { dep ->
             optional dep
             exclude group: 'org.slf4j', module: 'slf4j-api'
         }
         compile("joda-time:joda-time:1.6", optional)
+        compile("org.jruby:jruby:1.4.0", optional)
         compile("javax.cache:cache-api:0.5", optional)
         compile("net.sf.ehcache:ehcache-core:2.0.0", optional)
         compile("org.slf4j:slf4j-api:1.6.1", optional)