[IOT-2269] Do not include rowner property in csr resource CBOR

[IOT-2269] Do not include rowner property in csr resource CBOR

"rowner" property was being erroneously included in the CBOR
payload for the CSR resource, which caused the map in the
response to contain one more key/value pair than it should have.

This property should not be included as it is not part of the
specification for this resource.

Change-Id: I61a25535b79d21857b18f7f1f2bb077e8420b3f5
Signed-off-by: Kevin Kane <kkane@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20013
Reviewed-by: Alex Kelley <alexke@microsoft.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>