Downgrade Jedis to 2.8.1

Closes gh-6677

spring-boot-dependencies/pom.xml

@@ -104,7 +104,7 @@
 		<jboss-logging.version>3.3.0.Final</jboss-logging.version>
 		<jboss-transaction-spi.version>7.3.2.Final</jboss-transaction-spi.version>
 		<jdom2.version>2.0.6</jdom2.version>
-		<jedis.version>2.8.2</jedis.version>
+		<jedis.version>2.8.1</jedis.version>
 		<jersey.version>2.23.1</jersey.version>
 		<jest.version>2.0.3</jest.version>
 		<jetty.version>9.3.11.v20160721</jetty.version>