* Update search field placeholder to display `Search`
* Add an acceptance test to search node listings with node name and IP Address
* Update and add unit tests for filter/search node listing with IP Address
- yarn upgrade consul-api-double which includes `status/leader`
- add all the ember-data things required to call a new endpoint
- Pass the new leader variable through to the template
- use the new leader variable in the template to set a leader
- add acceptance testing to verify leaders are highlighted
- Change testing navigation/api requests to status/leader (on the node listing page, status/leader is now the last get request to
be called).
- Template whitespace commit (less indenting)
- adds a test to to assert no errors happen with an unelected leader
Kenia