Elasticsearch 5: Revert unrelated changes

This commit reverts some unrelated changes to POMs for other bindings,
perhaps made inadvertently while merging master into a development
branch.

hypertable/pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- 
-Copyright (c) 2012 - 2017 YCSB contributors. All rights reserved.
+Copyright (c) 2012 - 2016 YCSB contributors. All rights reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you
 may not use this file except in compliance with the License. You
@@ -40,7 +40,7 @@ LICENSE file.
     <dependency>
       <groupId>org.apache.thrift</groupId>
       <artifactId>libthrift</artifactId>
-      <version>0.8.0</version>
+      <version>${thrift.version}</version>
     </dependency>
     <dependency>
       <groupId>org.hypertable</groupId>

jdbc/pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- 
-Copyright (c) 2012 - 2017 YCSB contributors. All rights reserved.
+Copyright (c) 2012 - 2016 YCSB contributors. All rights reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you
 may not use this file except in compliance with the License. You
@@ -33,7 +33,7 @@ LICENSE file.
     <dependency>
       <groupId>org.apache.openjpa</groupId>
       <artifactId>openjpa-jdbc</artifactId>
-      <version>2.1.1</version>
+      <version>${openjpa.jdbc.version}</version>
     </dependency>
     <dependency>
       <groupId>com.yahoo.ycsb</groupId>