Add support for kibana 5.5.1

[alias454]

I downloaded the plugin and tried to install the source.zip but get type errors similar to this
elastic/kibana#12707

I tried to bumble my way through some changes but was unsuccessful in making it work.

Please let me know if you need more information form me.

Regards,
Brandon

[austin-taylor]

It looks like the directory needs to be kibana/name_of_plugin

Then you can use sudo bin/kibana-plugin install file:///name_of_plugin.zip

I'll update the zip file and resubmit PR

[austin-taylor]

#19

[clamarque]

@alias454 I will put soon a new release for 5.5.x. a release contain the source of code and the plugin functionnal (globaly with the name of plugin, for example kibana_health_metric_vis-5.5.x.) You can download this here next time. For now, I need to resolve some bugs before the release will be available