Upgrade to Hsqldb 2.3.6

Closes gh-13383

spring-boot-dependencies/pom.xml

@@ -90,7 +90,7 @@
 		<hikaricp.version>2.5.1</hikaricp.version>
 		<hikaricp-java6.version>2.3.13</hikaricp-java6.version>
 		<hikaricp-java7.version>2.4.13</hikaricp-java7.version>
-		<hsqldb.version>2.3.5</hsqldb.version>
+		<hsqldb.version>2.3.6</hsqldb.version>
 		<htmlunit.version>2.21</htmlunit.version>
 		<httpasyncclient.version>4.1.3</httpasyncclient.version>
 		<httpclient.version>4.5.5</httpclient.version>