Graceful termination failing test for trentm#97 and trentm#73

Will fail if any timers or callbacks remain registered when
instantiating a logger with a rotating file.

test/process-exit.js

@@ -0,0 +1,11 @@
+var bunyan = require('../lib/bunyan');
+var log = bunyan.createLogger({
+  name: 'default',
+  streams: [{
+    type: 'rotating-file',
+    path: __dirname + '/log.test.rot.log',
+    period: '1d',
+    count: 7
+  }]
+});
+console.log('done');

test/process-exit.test.js

@@ -0,0 +1,21 @@
+'use strict';
+/*
+ * Test that bunyan process will terminate
+ */
+
+var exec = require('child_process').exec;
+
+// node-tap API
+if (require.cache[__dirname + '/tap4nodeunit.js'])
+        delete require.cache[__dirname + '/tap4nodeunit.js'];
+var tap4nodeunit = require('./tap4nodeunit.js');
+var test = tap4nodeunit.test;
+
+test('log with rotating file stream will terminate gracefully', function (t) {
+  exec('node ' +__dirname + '/process-exit.js', {timeout: 1000}, function(err, stdout, stderr) {
+    t.ifError(err);
+    t.equal(stdout, 'done\n');
+    t.equal(stderr, '');
+    t.end();
+  });
+});