Move power errors to org.open_power.witherspoon

Move xyz.openbmc_project.Power to org.open_power.Witherspoon.
This repo is Witherspoon specific, so moving to specific tree to have
its own namespace. Update generated file, and corresponding namespace
statements in the source files.

Change-Id: I10bd1eeeac5b5f391ca54bf361b249b7ad531852
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/utility.cpp b/utility.cpp
index 25e401d..e54f839 100644
--- a/utility.cpp
+++ b/utility.cpp
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#include <xyz/openbmc_project/Power/Fault/error.hpp>
+#include <org/open_power/Witherspoon/Fault/error.hpp>
 #include "elog-errors.hpp"
 #include "utility.hpp"
 
@@ -33,7 +33,7 @@
 constexpr auto POWEROFF_TARGET   = "obmc-chassis-hard-poweroff@0.target";
 
 using namespace phosphor::logging;
-using namespace sdbusplus::xyz::openbmc_project::Power::Fault::Error;
+using namespace sdbusplus::org::open_power::Witherspoon::Fault::Error;
 
 
 std::string getService(const std::string& path,