[JIRA IOT-659] fix the bug related to CACreateEndpoint

[JIRA IOT-659] fix the bug related to CACreateEndpoint

CACreateEndpoint is returning CA_STATUS_OK without CAInitialize.
so I add the CA status check logic before calling CACreateEndpoint().

Change-Id: Icd0177efbf60dee2930fce1fddbcb401d4e4a549
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2047
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>
Reviewed-by: John Light <john.j.light@intel.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Erich Keane <erich.keane@intel.com>