Fixing race conditions in the code base (mattermost#5966)

* Adding initial race detector

* Remove setting of config twice

* Fixing config file watch and config reload on license save

* Fixing config file watch and config reload on license save

* Fixing build error

* Fixing locking issue

* Fixing makefile

* Fixing race in config

* Fixing race in status unit test

* Adding EE race tests

* Fixing race in cluster info

* Removing code that's isn't needed

* Fixing some more races

* Fixing govet issue

components/admin_console/cluster_table.jsx

@@ -79,7 +79,7 @@ export default class ClusterTable extends React.Component {
  clusterInfo.id = Utils.localizeMessage('admin.cluster.unknown', 'unknown');
  }
 
- if (clusterInfo.is_alive) {
+ if (clusterInfo.is_alive > 0) {
  status = (
  <img
  className='cluster-status'