HADOOP-18451. Update hsqldb.version from 2.3.4 to 2.5.2. (#4880)

LICENSE-binary

@@ -523,7 +523,7 @@ junit:junit:4.13.2
 HSQL License
 ------------
 
-org.hsqldb:hsqldb:2.3.4
+org.hsqldb:hsqldb:2.5.2
 
 
 JDOM License

hadoop-project/pom.xml

@@ -185,7 +185,7 @@
     <make-maven-plugin.version>1.0-beta-1</make-maven-plugin.version>
     <surefire.fork.timeout>900</surefire.fork.timeout>
     <aws-java-sdk.version>1.12.262</aws-java-sdk.version>
-    <hsqldb.version>2.3.4</hsqldb.version>
+    <hsqldb.version>2.5.2</hsqldb.version>
     <frontend-maven-plugin.version>1.11.2</frontend-maven-plugin.version>
     <jasmine-maven-plugin.version>2.1</jasmine-maven-plugin.version>
     <phantomjs-maven-plugin.version>0.7</phantomjs-maven-plugin.version>