Don't deploy mimetype if its properties have not changed

[rjrudin]

As an ml-gradle user
I want ml-gradle to (title)
So that the deployment process doesn't cause ML to restart for every unchanged mimetype, as the Manage API will trigger a restart regardless of whether the mimetype properties have changed or not

• "Have the properties changed" is simple for mimetype, as there's just the "extension" array and the "format" field.
• This feature should account for the extensions being in a different order and should consider those arrays to be equal - e.g. "jpeg, jpg, jpe" is the same as "jpe, jpeg, jpg"