IOMgr changes for order-by without limit

Change-Id: I361d1c6d0f588a726f2add3f96bd1fc724ed83ac
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2666
Reviewed-by: Srinath Shankar <sshankar@cloudera.com>
Tested-by: jenkins
Add decimal UDF/UDA support.

Change-Id: Ie48c1cb8e978c7282593b7f602dd68added6d3fd
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2625
Reviewed-by: Skye Wanderman-Milne <skye@cloudera.com>
Tested-by: jenkins
Fix recovering from Llama restart. Refactor connect/rpc/retry logic.

Change-Id: Idfbbfc3141cb9774d30ed1b1da4fe2cd9e511889
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2685
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2737