src,test: update snapshot failure in node.cc and associated test

Author: debadree25

src/node.cc

@@ -1156,8 +1156,7 @@ ExitCode LoadSnapshotDataAndRun(const SnapshotData** snapshot_data_ptr,
     FILE* fp = fopen(filename.c_str(), "rb");
     if (fp == nullptr) {
       fprintf(stderr, "Cannot open %s", filename.c_str());
-      // TODO(joyeecheung): should be kStartupSnapshotFailure.
-      exit_code = ExitCode::kGenericUserError;
+      exit_code = ExitCode::kStartupSnapshotFailure;
       return exit_code;
     }
     std::unique_ptr<SnapshotData> read_data = std::make_unique<SnapshotData>();

test/parallel/test-snapshot-error.js

@@ -47,7 +47,7 @@ const entry = fixtures.path('snapshot', 'error.js');
   console.log(child.status);
   console.log(stderr);
   console.log(child.stdout.toString());
-  assert.strictEqual(child.status, 1);
+  assert.strictEqual(child.status, 14);
   assert.match(stderr, /Cannot open/);
   assert(!fs.existsSync(path.join(tmpdir.path, 'snapshot.blob')));
 }