[MISC] Fix malformed requests preventing charles proxy from working

Author: Bargs

src/plugins/kibana/server/routes/api/ingest/register_post.js

@@ -115,7 +115,7 @@ export function registerPost(server) {
       };
 
       const pipelineParams = {
-        path: `_ingest/pipeline/${ingestConfigName}`,
+        path: `/_ingest/pipeline/${ingestConfigName}`,
         method: 'PUT',
         body: pipeline
       };

src/plugins/kibana/server/routes/api/ingest/register_simulate.js

@@ -21,7 +21,7 @@ export function registerSimulate(server) {
       const body = ingestSimulateApiKibanaToEsConverter(simulateApiDocument);
 
       return boundCallWithRequest('transport.request', {
-        path: '_ingest/pipeline/_simulate',
+        path: '/_ingest/pipeline/_simulate',
         query: { verbose: true },
         method: 'POST',
         body: body