Adds generated recipes for missing checks

[albertvaka]

Fixes bundle exec rake create_integration_monitor introduced in #720
and adds 54 recipes created with it.

I didn't include checks that already have recipes since in some cases it
causes behavior changes or renames, so we might want to wait for a major
release bump to do that. Except for riak, since it looked safe to replace.

Left out zk, elastic and couch even though they are "new" recipes
because they aren't actually new: the current ones are named zookeeper,
elasticsearch and couchdb, which don't match the generated filenames.

[julien-lebot]

LGTM !

[KSerrania]

The logic change looks good to me. I only have one question:

I didn't include checks that already have recipes since in some cases it
causes behavior changes or renames, so we might want to wait for a major
release bump to do that. Except for riak, since it looked safe to replace.

For riak, this PR adds:

  init_config node['datadog']['riak']['init_config']
...
  use_integration_template true

Is this change safe because it doesn't actually change the behavior of the integration?

[albertvaka]

Yes, the previous recipe used the riak template [1] which essentially results in the same as the default template [2] except that the riak template only took into account the url field within the instances array. Now it will still support the url field, plus any other field you add.

[1] https://github.com/DataDog/chef-datadog/blob/master/templates/default/riak.yaml.erb
[2] https://github.com/DataDog/chef-datadog/blob/master/templates/default/integration.yaml.erb