[SPARK-1419] Bumped parent POM to apache 14

Keeping up-to-date with the parent, which includes some bugfixes.

Author: Mark Hamstra <markhamstra@gmail.com>

Closes #328 from markhamstra/Apache14 and squashes the following commits:

3f19975 [Mark Hamstra] Bumped parent POM to apache 14

pom.xml

@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache</groupId>
     <artifactId>apache</artifactId>
-    <version>13</version>
+    <version>14</version>
   </parent>
   <groupId>org.apache.spark</groupId>
   <artifactId>spark-parent</artifactId>