Eager load text_tables and vmdb_indexes to avoid N + 1
Eager load text_tables and vmdb_indexes to avoid N + 1

During seeding, we traverse each evm_tables and look at the text_tables
and vmdb_indexes so we can keep these subtables in sync so preload
the subtables.

Initial VmdbDatabase.seed:
6319 -> 6438 (119 MORE queries)

Each subsequent VmdbDatabase.seed:
1981 -> 1483 (498 (25%) LESS queries)

ruby -r ./count_queries -e "puts count_queries { VmdbDatabase.seed }"

count_queries script:

From: http://stackoverflow.com/a/22388177
```ruby
require './config/environment'

def count_queries &block
  count = 0

  counter_f = ->(name, started, finished, unique_id, payload) {
    unless payload[:name].in? %w[ CACHE SCHEMA ]
      count += 1
    end
  }

  ActiveSupport::Notifications.subscribed(counter_f, "sql.active_record", &block)

  count
end
```

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