Upgrade to SRP 0.6

DATAREDIS-186

- Handle a few method signature changes to varargs

- Handle possibility of exec() throwing Exceptions
if ErrorReply received in Redis 2.6

gradle.properties

@@ -6,7 +6,7 @@ jedisVersion=2.1.0
 springVersion=3.1.4.RELEASE
 log4jVersion=1.2.17
 version=1.0.5.BUILD-SNAPSHOT
-srpVersion=0.5
+srpVersion=0.6
 jacksonVersion=1.8.8
 lettuceVersion=2.3.2
 mockitoVersion=1.8.5