Fix cropping of error output when called from another process

Use similar method as in mochajs/mocha#333

lib/jasmine-node/cli.js

@@ -193,7 +193,7 @@ if (captureExceptions) {
   process.on('uncaughtException', function(e) {
     console.error(e.stack || e);
     exitCode = 1;
-    process.exit(exitCode);
+    exitAfterStreamWritesCompleted();
   });
 }
 
@@ -212,10 +212,27 @@ var onComplete = function(runner, log) {
     exitCode = 1;
   }
   if (forceExit) {
-    process.exit(exitCode);
+    exitAfterStreamWritesCompleted();
   }
 };
 
+function exitAfterStreamWritesCompleted() {
+  var streams = [process.stdout, process.stderr];
+  var writesToWait = streams.length;
+
+  streams.forEach(function(stream){
+    // submit empty write request and wait for completion
+    stream.write('', exitIfAllStreamsCompleted);
+  });
+
+  function exitIfAllStreamsCompleted() {
+    writesToWait--;
+    if (writesToWait == 0) {
+        process.exit(exitCode);
+    }
+  }
+}
+
 if(useHelpers){
   specFolders.forEach(function(path){
     jasmine.loadHelpersInFolder(path,