[Platform][Security] Updates cluster_manager ignorePaths to include s…

…ecurity scripts (elastic#70139) (elastic#70276)

## Summary

Updates the cluster_manager `ignorePaths` to include security related script directories so that the server doesn't restart when modifying scripts like below... 🙂 

<p align="center">
  <img width="600" src="https://user-images.githubusercontent.com/2946766/85908688-4dd4de00-b7d3-11ea-9e64-38729a5cb63f.png" />
</p>

src/cli/cluster/cluster_manager.ts

@@ -266,6 +266,11 @@ export class ClusterManager {
  fromRoot('x-pack/plugins/apm/e2e'),
  fromRoot('x-pack/plugins/apm/scripts'),
  fromRoot('x-pack/plugins/canvas/canvas_plugin_src'), // prevents server from restarting twice for Canvas plugin changes,
+ fromRoot('x-pack/plugins/case/server/scripts'),
+ fromRoot('x-pack/plugins/lists/scripts'),
+ fromRoot('x-pack/plugins/lists/server/scripts'),
+ fromRoot('x-pack/plugins/security_solution/scripts'),
+ fromRoot('x-pack/plugins/security_solution/server/lib/detection_engine/scripts'),
  'plugins/java_languageserver',
  ];