Refine ivy file config. The org were not configured correctly. (#551)

diff --git a/helix-core/helix-core-0.9.2-SNAPSHOT.ivy b/helix-core/helix-core-0.9.2-SNAPSHOT.ivy
index d4c8dff..07dd266 100644
--- a/helix-core/helix-core-0.9.2-SNAPSHOT.ivy
+++ b/helix-core/helix-core-0.9.2-SNAPSHOT.ivy
@@ -57,8 +57,8 @@
     <dependency org="org.codehaus.jackson" name="jackson-mapper-asl" rev="1.8.5" conf="compile->compile(default);runtime->runtime(default);default->default"/>
     <dependency org="commons-io" name="commons-io" rev="1.4" conf="compile->compile(default);runtime->runtime(default);default->default"/>
     <dependency org="commons-cli" name="commons-cli" rev="1.2" conf="compile->compile(default);runtime->runtime(default);default->default"/>
-    <dependency org="commons-math" name="commons-math" rev="2.1" conf="compile->compile(default);runtime->runtime(default);default->default"/>
-    <dependency org="commons-math3" name="commons-math3" rev="3.6.1" conf="compile->compile(default);runtime->runtime(default);default->default"/>
+    <dependency org="org.apache.commons" name="commons-math" rev="2.1" conf="compile->compile(default);runtime->runtime(default);default->default"/>
+    <dependency org="org.apache.commons" name="commons-math3" rev="3.6.1" conf="compile->compile(default);runtime->runtime(default);default->default"/>
     <dependency org="com.101tec" name="zkclient" rev="0.5" conf="compile->compile(default);runtime->runtime(default);default->default"/>
     <dependency org="com.google.guava" name="guava" rev="15.0" conf="compile->compile(default);runtime->runtime(default);default->default"/>
     <dependency org="org.yaml" name="snakeyaml" rev="1.12" conf="compile->compile(default);runtime->runtime(default);default->default"/>