Move Active BMC version object to item_updater.

- There needs to be only one version class for both
  BMC and PNOR images. Thus removing the BMCVERSION
  class and moving the functionality to MANAGER class.

Change-Id: I6dda818960588cfd9ed345fe93068531efc7a877
Signed-off-by: Saqib Khan <khansa@us.ibm.com>
diff --git a/version.hpp b/version.hpp
index 75289a3..eca6670 100755
--- a/version.hpp
+++ b/version.hpp
@@ -62,6 +62,12 @@
          **/
         static std::string getId(const std::string& version);
 
+        /**
+         * @brief Get the active bmc version identifier.
+         *
+         * @return The version identifier.
+         */
+        static std::string getBMCVersion();
 };
 
 } // namespace manager