Updated a code value of CAResponseResult_t.

Updated a code value of CAResponseResult_t.

since there is no code in CoAP Spec.
I have removed CA_SUCCESS code from CA.

According to CoAP Spec, 2.05 Content code is like HTTP 200 "OK"
thur 2.05 will be used instead of 2.00.

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5.9.1.5.  2.05 Content

This Response Code is like HTTP 200 "OK" but only used
in response to GET requests.

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Change-Id: I9f4d3c09661c4dec967f2bb91f51941b93084a93
Signed-off-by: jihwan.seo <jihwan.seo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2549
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>