Index Pattern ID Hack-Fix

[wrathagom]

Right now we are creating the index patterns manually by directly writing to ES rather than use the new Kibana API. This is because the API doesn't allow specifying an _id which we need to do because of how we link up our Discover button with the indices. We should correct this.

• [ ] Use the API to create the index pattern in the API upon creation.
• [ ] Store the returned index-pattern id on the channel record
• [ ] Modify the discover button to use this indexPatternId to correctly link to the discover page