tests: more common'ification

src/support.js

@@ -2,10 +2,12 @@
 
 exports = module.exports = {
     getRemoteSupport,
-    enableRemoteSupport
+    enableRemoteSupport,
+
+    _sshInfo: sshInfo
 };
 
-let assert = require('assert'),
+const assert = require('assert'),
     BoxError = require('./boxerror.js'),
     constants = require('./constants.js'),
     eventlog = require('./eventlog.js'),
@@ -54,7 +56,7 @@ function enableRemoteSupport(enable, auditSource, callback) {
     assert.strictEqual(typeof auditSource, 'object');
     assert.strictEqual(typeof callback, 'function');
 
-    let si = sshInfo();
+    const si = sshInfo();
     shell.sudo('support', [ AUTHORIZED_KEYS_CMD, enable ? 'enable' : 'disable', si.filePath, si.user ], {}, function (error) {
         if (error) callback(new BoxError(BoxError.FS_ERROR, error));