[cpprest-sdk]: use _XPLATSTR for string_t on Windows

Author: aminya

modules/openapi-generator/src/main/resources/cpp-rest-sdk-client/model-header.mustache

@@ -136,14 +136,14 @@ public:
         std::map<e{{classname}},utility::string_t> enumToStrMap = {
         {{#allowableValues}}
         {{#enumVars}}
-        { e{{classname}}::{{{name}}}, "{{{name}}}" }{{^-last}},{{/-last}}
+        { e{{classname}}::{{{name}}}, _XPLATSTR("{{{name}}}") }{{^-last}},{{/-last}}
         {{/enumVars}}
         {{/allowableValues}}
 };
         std::map<utility::string_t,e{{classname}}> strToEnumMap = {
         {{#allowableValues}}
         {{#enumVars}}
-        { "{{{name}}}", e{{classname}}::{{{name}}} }{{^-last}},{{/-last}}
+        { _XPLATSTR("{{{name}}}"), e{{classname}}::{{{name}}} }{{^-last}},{{/-last}}
         {{/enumVars}}
         {{/allowableValues}}
 };

samples/client/petstore/cpp-restsdk/client/include/CppRestPetstoreClient/model/Color.h

@@ -67,18 +67,18 @@ class  Color
     protected:
         eColor m_value;
         std::map<eColor,utility::string_t> enumToStrMap = {
-        { eColor::BLACK, "BLACK" },
-        { eColor::WHITE, "WHITE" },
-        { eColor::BROWN, "BROWN" },
-        { eColor::GOLDEN, "GOLDEN" },
-        { eColor::MIXED, "MIXED" }
+        { eColor::BLACK, _XPLATSTR("BLACK") },
+        { eColor::WHITE, _XPLATSTR("WHITE") },
+        { eColor::BROWN, _XPLATSTR("BROWN") },
+        { eColor::GOLDEN, _XPLATSTR("GOLDEN") },
+        { eColor::MIXED, _XPLATSTR("MIXED") }
 };
         std::map<utility::string_t,eColor> strToEnumMap = {
-        { "BLACK", eColor::BLACK },
-        { "WHITE", eColor::WHITE },
-        { "BROWN", eColor::BROWN },
-        { "GOLDEN", eColor::GOLDEN },
-        { "MIXED", eColor::MIXED }
+        { _XPLATSTR("BLACK"), eColor::BLACK },
+        { _XPLATSTR("WHITE"), eColor::WHITE },
+        { _XPLATSTR("BROWN"), eColor::BROWN },
+        { _XPLATSTR("GOLDEN"), eColor::GOLDEN },
+        { _XPLATSTR("MIXED"), eColor::MIXED }
 };
 
 };