HADOOP-13545. Update HSQLDB to 2.3.4. Contributed by Giovanni Matteo Fumarola.

LICENSE.txt

@@ -736,7 +736,7 @@ hadoop-tools/hadoop-sls/src/main/html/js/thirdparty/d3-LICENSE
 
 The binary distribution of this product bundles these dependencies under the
 following license:
-HSQLDB Database 2.0.0
+HSQLDB Database 2.3.4
 --------------------------------------------------------------------------------
 (HSQL License)
 "COPYRIGHTS AND LICENSES (based on BSD License)

hadoop-project/pom.xml

@@ -131,6 +131,7 @@
     <native-maven-plugin.version>1.0-alpha-8</native-maven-plugin.version>
     <surefire.fork.timeout>900</surefire.fork.timeout>
     <aws-java-sdk.version>1.11.86</aws-java-sdk.version>
+    <hsqldb.version>2.3.4</hsqldb.version>
     <!-- the version of Hadoop declared in the version resources; can be overridden
     so that Hadoop 3.x can declare itself a 2.x artifact. -->
     <declared.hadoop.version>${project.version}</declared.hadoop.version>
@@ -1038,7 +1039,7 @@
       <dependency>
         <groupId>org.hsqldb</groupId>
         <artifactId>hsqldb</artifactId>
-        <version>2.0.0</version>
+        <version>${hsqldb.version}</version>
       </dependency>
       <dependency>
         <groupId>com.codahale.metrics</groupId>