Add equality between Enums and Strings.

[mattcoley]

There isn't a way to declare an enum value in Jinjava which makes it difficult to check for different enum values.
{% if enum == 'ENUM_VALUE' %} should ideally work since {{ enum }} will display a string value.

[hs-lsong]

Is enum usually integers?

[mattcoley]

In the HubSpot case, the enum would be something like a language enum that would print out the language tag en, ge, jp, etc.

[mattcoley]

The hacky way to get around this is to do |string on an object to convert these enums to strings. We need a better long term solution.