Fixed error handling for API frame

no issue

- throwing an object from a catch handler is not a good idea
- unexpected and broke functional call to API (always returned a 500, because API returned {err: err, method: ...}

core/server/api/shared/http.js

@@ -79,8 +79,12 @@ const http = (apiImpl, apiType) => {
                 debug('json response');
                 res.json(result || {});
             })
-            .catch(({err, docName, method}) => {
-                req.frameOptions = {docName, method};
+            .catch((err) => {
+                req.frameOptions = {
+                    docName: frame.docName,
+                    method: frame.method
+                };
+
                 next(err);
             });
     };

core/server/api/shared/pipeline.js

@@ -138,6 +138,9 @@ const pipeline = (apiController, apiUtils) => {
                 return apiImpl(frame);
             }
 
+            frame.docName = docName;
+            frame.method = method;
+
             return Promise.resolve()
                 .then(() => {
                     return STAGES.validation.input(apiUtils, apiConfig, apiImpl, frame);
@@ -156,9 +159,6 @@ const pipeline = (apiController, apiUtils) => {
                 })
                 .then(() => {
                     return frame.response;
-                })
-                .catch((err) => {
-                    throw {err, docName, method};
                 });
         };