sdbus++: add server method for set-property

Add a method to the server bindings that sets properties
by looking up the name from a string.

Change-Id: I7e9081b66dfeffd394155a574c2178a7cd039e2a
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/sdbusplus/message/types.hpp b/sdbusplus/message/types.hpp
index 4daebf3..a65bc31 100644
--- a/sdbusplus/message/types.hpp
+++ b/sdbusplus/message/types.hpp
@@ -16,8 +16,11 @@
 namespace message
 {
 
+namespace variant_ns = mapbox::util;
+
 template <typename ...Args>
-using variant = mapbox::util::variant<Args...>;
+using variant = variant_ns::variant<Args...>;
+
 
 namespace types
 {