Support JUSTID flag of XCLAIM command.

[christophstrobl]

Feature Request

The JUSTID flags allows to claim the message from the PEL without increasing the retry counter.

List<String> xClaimJustId(String key, String group, String consumername, long minIdleTime, long newIdleTime, int retries, boolean force, StreamEntryID... ids);

[gkorland]

  List<StreamEntryID> xclaimIDs( String key, String group, String consumername, long minIdleTime, 
      long newIdleTime, int retries, boolean force, StreamEntryID... ids);