Code refactoring

Moved all the constants to const.hpp and utility method to
utils.cpp/hpp.
Removed file ibm_vpd_type_check.cpp/hpp and keyword_vpd_types.hpp.

Signed-off-by: SunnySrivastava1984 <sunnsr25@in.ibm.com>
Change-Id: Ie7b54e6fd03a499fab7c3124e17292c6d525e471
diff --git a/ibm_vpd_app.cpp b/ibm_vpd_app.cpp
index b761b10..24363d0 100644
--- a/ibm_vpd_app.cpp
+++ b/ibm_vpd_app.cpp
@@ -1,7 +1,6 @@
 #include "config.h"
 
 #include "defines.hpp"
-#include "ibm_vpd_type_check.hpp"
 #include "keyword_vpd_parser.hpp"
 #include "parser.hpp"
 #include "utils.hpp"
@@ -21,10 +20,10 @@
 using namespace openpower::vpd;
 using namespace CLI;
 using namespace vpd::keyword::parser;
-using namespace vpdFormat;
 using namespace openpower::vpd::constants;
 namespace fs = filesystem;
 using json = nlohmann::json;
+using namespace openpower::vpd::inventory;
 
 /**
  * @brief Expands location codes