Upgrade to Jedis 2.9.1

Closes gh-15683

Author: wilkinsona

spring-boot-dependencies/pom.xml

@@ -108,7 +108,7 @@
 		<jboss-logging.version>3.3.2.Final</jboss-logging.version>
 		<jboss-transaction-spi.version>7.6.0.Final</jboss-transaction-spi.version>
 		<jdom2.version>2.0.6</jdom2.version>
-		<jedis.version>2.9.0</jedis.version>
+		<jedis.version>2.9.1</jedis.version>
 		<jersey.version>2.25.1</jersey.version>
 		<jest.version>2.0.4</jest.version>
 		<jetty.version>9.4.14.v20181114</jetty.version>