Change resource type, URI, and all relevant words in Easy setup service

Change resource type, URI, and all relevant words in Easy setup service

On decision of OCF meeting, resource types and URIs of easy setup resources
are decided to be changed:
* Resource type
  oic.wk.prov -> oic.r.easysetup
  oic.wk.wifi -> oic.r.wificonf
  oic.wk.cloudserver -> oic.r.coapcloudconf
  oic.wk.devconf -> oic.r.devconf
* URI
  /ProvisioningResURI -> /EasySetupResURI
  /WiFiProvisioningResURI -> /WiFiConfResURI
  /CloudServerProvisioningResURI -> /CoapCloudConfResURI
  /DevConfProvisioningResURI -> /DevConfResURI

Along with those changes, all classes, functions, structures' names are
changed, respectively.

Change-Id: I45a34e69be3348dd5adb9f7478995bee53be80e5
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16581
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>