rename headers to match style

Moving headers from ".h" to ".hpp"

Reworked the header inclusion a bit so that host-ipmid is treated as a
library, and local headers aren't.

renamed apphandler.h => apphandler.hpp
renamed chassishandler.h => chassishandler.hpp
renamed globalhandler.h => globalhandler.hpp
renamed sensorhandler.h => sensorhandler.hpp
renamed storageaddsel.h => storageaddsel.hpp
renamed storagehandler.h => storagehandler.hpp
renamed systemintfcmds.h => systemintfcmds.hpp

Change-Id: I9d4ce3dd57e2e996800f9020a10cc10cdf2c3914
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/storagehandler.cpp b/storagehandler.cpp
index 871eae6..24c9d30 100644
--- a/storagehandler.cpp
+++ b/storagehandler.cpp
@@ -18,8 +18,12 @@
 #include "fruread.hpp"
 #include "read_fru_data.hpp"
 #include "selutility.hpp"
+#include "sensorhandler.hpp"
+#include "storageaddsel.hpp"
+#include "storagehandler.hpp"
 #include "utils.hpp"
 
+#include <host-ipmid/ipmid-api.h>
 #include <mapper.h>
 #include <systemd/sd-bus.h>
 
@@ -29,11 +33,6 @@
 #include <string>
 #include <xyz/openbmc_project/Common/error.hpp>
 
-#include "host-ipmid/ipmid-api.h"
-#include "sensorhandler.h"
-#include "storageaddsel.h"
-#include "storagehandler.h"
-
 void register_netfn_storage_functions() __attribute__((constructor));
 
 unsigned int g_sel_time = 0xFFFFFFFF;