HOTFIX: Fix build issue with Akka 2.3.4 upgrade.

We had to upgrade our Hive 0.12 version as well to deal with a protobuf
conflict (both hive and akka have been using a shaded protobuf version).
This is testing a correctly patched version of Hive 0.12.

Author: Patrick Wendell <pwendell@gmail.com>

Closes #2756 from pwendell/hotfix and squashes the following commits:

cc979d0 [Patrick Wendell] HOTFIX: Fix build issue with Akka 2.3.4 upgrade.

pom.xml

@@ -127,7 +127,7 @@
     <hbase.version>0.94.6</hbase.version>
     <flume.version>1.4.0</flume.version>
     <zookeeper.version>3.4.5</zookeeper.version>
-    <hive.version>0.12.0-protobuf</hive.version>
+    <hive.version>0.12.0-protobuf-2.5</hive.version>
     <parquet.version>1.4.3</parquet.version>
     <jblas.version>1.2.3</jblas.version>
     <jetty.version>8.1.14.v20131031</jetty.version>
@@ -223,6 +223,18 @@
         <enabled>false</enabled>
       </snapshots>
     </repository>
+    <repository>
+      <!-- This is temporarily included to fix issues with Hive 0.12 -->
+      <id>spark-staging</id>
+      <name>Spring Staging Repository</name>
+      <url>https://oss.sonatype.org/content/repositories/orgspark-project-1085</url>
+      <releases>
+        <enabled>true</enabled>
+      </releases>
+      <snapshots>
+        <enabled>false</enabled>
+      </snapshots>
+    </repository>
   </repositories>
   <pluginRepositories>
     <pluginRepository>