Check for type and format in the original param instead of checking for value after processing

lib/schemaUtils.js

@@ -1701,6 +1701,7 @@ module.exports = {
     var contentObj, // content is required
       bodyData,
       param,
+      originalParam,
       paramArray = [],
       updateOptions = {},
       reqBody = new sdk.RequestBody(),
@@ -1832,8 +1833,14 @@ module.exports = {
           }
         }
 
-        // Set param type to 'file' for binary value
-        if (value === '<binary>') {
+        // Fetch the original param and if it is of type 'string' and format 'binary'
+        // then set the type of FormParam to 'file'
+        originalParam = _.get(contentObj[FORM_DATA], ['schema', 'properties', key]);
+
+        if (originalParam &&
+          originalParam.type === 'string' &&
+          originalParam.format === 'binary'
+        ) {
           param = new sdk.FormParam({
             key: key,
             value: '',