[Enrollee] Implement ESInitEnrollee() API

[Enrollee] Implement ESInitEnrollee() API

1. Add new data structure
  : ResourceMask, ESProvisioningCallbacks, ESWiFiProvData, ESDevConfProvData, ESCloudProvData
2. Update ResourceHandler's post handling
  : update wifi data, dev conf data, cloud prov data which are delivered to easysetup callback

* Need to develop sample app. (enrollee side)
* Need to erase unused code

Change-Id: Iaae6776f476566b9fd3dd0d883843d131d755630
Signed-off-by: sy01.youn <sy01.youn@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/8805
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>