Add additional categories

[ruflin]

In the process of defining our integrations page, additional categories were defined: https://www.elastic.co/integrations This PR adds these categories to the registry.

It must be followed up to update all existing packages and then remove the old category definitions.

[ruflin]

@ph @mostlyjason @mtojek @andresrc The above means we should update all the packages with the related categories. Please reach out to @mostlyjason for the correct mapping.

@mostlyjason Can you validate the the category list is correct?

[elasticmachine]

💚 Build Succeeded

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Build stats

• Build Cause: [Pull request #534 updated]

• Start Time: 2020-06-24T07:01:05.825+0000

• Duration: 8 min 51 sec

Test stats 🧪

Test	Results
Failed	0
Passed	127
Skipped	0
Total	127

[mtojek]

@mostlyjason Please create an issue in the integrations repository with updated categories for packages. We can pick it up from there.

[mostlyjason]

Thanks I left a comment on a separate thread discussing a new category field. I proposed that we move forward with this PR and come back later to update the categories if needed. Lets give a day or two to see if there are any objections.

[ruflin]

@mostlyjason Merged this PR so we can move forward with the changes in the packages but happy to follow up if you find more issues in the category names.