Release note updates for 1.1
Release note updates for 1.1

Change-Id: Ifa6bf79830d0b7fd2595d1ba64ea3673e90e5008
Reviewed-on: http://gerrit.cloudera.org:8080/5079
Reviewed-by: Jean-Daniel Cryans <4bf4c125525b8623ac45dfd7774cbf531df19085@apache.org>
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>
Tested-by: Kudu Jenkins
Tested-by: Todd Lipcon <2c763d726a8c2f6afda9be7e0e56a2caa6bb5e6b@apache.org>

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