Refactor Pipeline / Transaction to consume responses based on their requests, not rely on pipelinedCommands

* remove pipelinedCommands field at Connection class
** it was a risky state value
*** it was under 0 or over 0(though all commands are executed) while some situation
* remove Connection.getAll(), Connection.getAll(int except)

src/main/java/redis/clients/jedis/Queable.java

@@ -24,4 +24,11 @@ public class Queable {
         return lr;
     }
 
+    protected boolean hasPipelinedResponse() {
+    	return pipelinedResponses.size() > 0;
+    }
+    
+    protected int getPipelinedResponseLength() {
+    	return pipelinedResponses.size();
+    }
 }