test: Suppress debugger test and fixed jslint

* Suppress running debugger test
* Fixed jslint warning that came post-merge
* Currently there are 18 failures. `parallel/test-util-inspect-simd`
fails because chakracore has not implemented all the SIMD objects
that test uses. `parallel/test-vm-low-stack-space` is also a new
failure that expects vm to run script after we catch `out of stack
space` exception. I will debug this further to see gap in chakrashim
but for now, letting this test to fail with node+chakracore.

PR-URL: #74
Reviewed-By: Jianchun Xu <Jianchun.Xu@microsoft.com>

test/parallel/test-debug-port-numbers.js

@@ -11,6 +11,12 @@ const spawn = require('child_process').spawn;
 // instead of just the debugger process.
 const detached = !common.isWindows;
 
+if (common.isChakraEngine) {
+  console.log('1..0 # Skipped: This test is disabled for chakra engine ' +
+  'because debugger support is not implemented yet.');
+  return;
+}
+
 const children = [];
 for (let i = 0; i < 4; i += 1) {
   const port = common.PORT + i;

test/parallel/test-debug-signal-cluster.js

@@ -9,7 +9,7 @@ if (common.isChakraEngine) {
   return;
 }
 
-const PORT_MIN = common.PORT + 1;  // The fixture uses common.PORT.
+const port = common.PORT + 1;  // The fixture uses common.PORT.
 var args = ['--debug-port=' + port,
             common.fixturesDir + '/clustered-server/app.js'];
 var options = { stdio: ['inherit', 'inherit', 'pipe', 'ipc'] };