Fix a bunch of warnings

using the list of warnings from here:
https://github.com/lefticus/cppbestpractices/blob/e73393f25a85f83fed7399d8b65cb117d00b2231/02-Use_the_Tools_Available.md#L100

Seems like a good place to start, and would improve things a bit
type-wise.  This patchset attempts to correct all the issues in one
shot.

Tested:
It builds.  Will test various subsystems that have been touched

Signed-off-by: Ed Tanous <ed.tanous@intel.com>
Change-Id: I588c26440e5a97f718a0f0ea74cc84107d53aa1e
diff --git a/redfish-core/include/registries.hpp b/redfish-core/include/registries.hpp
index 6b30be9..411e9a0 100644
--- a/redfish-core/include/registries.hpp
+++ b/redfish-core/include/registries.hpp
@@ -34,7 +34,7 @@
     const char* description;
     const char* message;
     const char* severity;
-    const int numberOfArgs;
+    const size_t numberOfArgs;
     std::array<const char*, 5> paramTypes;
     const char* resolution;
 };