http service: replace JedisPool with own pool implementation

JedisPool appears to not work correctly and is losing connections.

http-service/pom.xml

@@ -105,6 +105,12 @@
 			<groupId>redis.clients</groupId>
 			<artifactId>jedis</artifactId>
 			<version>2.10.0</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.commons</groupId>
+					<artifactId>commons-pool2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>