Bump hsqldb from 2.2.4 to 2.7.1

Bumps hsqldb from 2.2.4 to 2.7.1.

---
updated-dependencies:
- dependency-name: org.hsqldb:hsqldb
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -29,7 +29,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <cdap.version>6.8.0-SNAPSHOT</cdap.version>
     <hadoop.version>2.10.2</hadoop.version>
-    <hsql.version>2.2.4</hsql.version>
+    <hsql.version>2.7.1</hsql.version>
     <hydrator.version>2.11.0-SNAPSHOT</hydrator.version>
     <!-- properties for script build step that creates the config files for the artifacts -->
     <widgets.dir>widgets</widgets.dir>