Merge branch 'stable-3.2' into stable-3.3

* stable-3.2:
  enable google Javascript formatter

also fix following errors reported by eslint :

/gr-task-plugin/gr-task-plugin-tasks.js
  1:2  error  Missing @license  jsdoc/require-file-overview

/gr-task-plugin/gr-task-plugin.js
  1:2  error  Missing @license  jsdoc/require-file-overview

/gr-task-plugin/plugin.js
  22:1  error  Expected indentation of 6 spaces but found 4  indent

Change-Id: Ia099b5af436fc5a4ccdbc40b68ddb3ca2c7ba847