fix include names

cppcheck isn't smart enough to recognize these are c++ headers, not c
headers.  Considering we're already inconsistent about our naming, it's
easier to just be consistent, and move the last few files to use .hpp
instead of .h.

Tested:
Code builds, no changes.

Signed-off-by: Ed Tanous <ed@tanous.net>
Change-Id: Ic348d695f8527fa4a0ded53f433e1558c319db40
diff --git a/include/ibm/management_console_rest.hpp b/include/ibm/management_console_rest.hpp
index b0e57ed..3612b4f 100644
--- a/include/ibm/management_console_rest.hpp
+++ b/include/ibm/management_console_rest.hpp
@@ -1,7 +1,7 @@
 #pragma once
-#include <app.h>
 #include <tinyxml2.h>
 
+#include <app.hpp>
 #include <async_resp.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/container/flat_set.hpp>