Supports Multi Key commands to JedisCluster

[HeartSaVioR]

Hello.

As supporting Redis Cluster work, I implemented Cluster multi key commands based on previous interfaces.

During implementing, I found that some commands are fine with Redis, but maybe some commands are not fine with Redis Cluster.
(Actually there're no documentation from Redis describing cluster-able commands.)

So I removed some suspicious commands from interface, and introduced new interfaces for Jedis Cluster.
(Please let me know when you think something is wrong.)

Below is the commands I removed from previous interfaces.

BinaryJedisClusterCommands (copied from BinaryCommands)

• List<byte[]> blpop(byte[] arg);
• List<byte[]> brpop(byte[] arg);
• Long move(byte[] key, int dbIndex);

MultiKeyBinaryJedisClusterCommands (copied from MultiKeyBinaryCommands)

• List<byte[]> blpop(byte[]... args);
• List<byte[]> brpop(byte[]... args);
• Set<byte[]> keys(byte[] pattern);
• String watch(byte[]... keys);
• String unwatch();
• byte[] randomBinaryKey();

JedisClusterCommands (copied from JedisCommands)

• List blpop(String arg);
• List brpop(String arg);
• Long move(String key, int dbIndex);
• ScanResult<Map.Entry<String, String>> hscan(final String key, int cursor);
• ScanResult sscan(final String key, int cursor);
• ScanResult zscan(final String key, int cursor);

MultiKeyJedisClusterCommands (copied from MultiKeyCommands)

• String watch(String... keys);
• String unwatch();
• String randomKey();
• ScanResult scan(int cursor);
• ScanResult scan(final String cursor);
• Set keys(String pattern);
• List blpop(String... args);
• List brpop(String... args);

And I introduce some utils and exception, you can find it from commit log.

Please review and comment so that this PR goes to cluster-revised.
Thanks!

[vishnusaran]

I would really appreciate if the authors could merge this pull request. I am very dependent on this feature. Thanks!!

[HeartSaVioR]

@xetorthio @marcosnils
Early adopters need this functionalities, so we would review this and merge to cluster-revised branch.
Please review when you have some leisure time. Thanks in advance!

[xetorthio]

There are lots of spaces and tab changes which makes it extremely hard to read the code and see the actual changes.
Would you mind re-sending the PR without those extra spaces and tabs?

[HeartSaVioR]

@xetorthio Oh, I'm sorry.
I'm using IntelliJ (as you know), and I was applying "format" from STS.
In the result unintention things are also formatted.
Let me check it again. Thanks!

[HeartSaVioR]

Let's move on #687! Closing.