[Swift] make sure to only escape an enum if the actual final variable name is…

[jaz-ah]

… going to match the enum name - now that we camelCase variable names this cuts down on the amount of enum escaping we have.

[wing328]

@jaz-ah when you've time, do you mind giving an example to illustrate the issue?

[jaz-ah]

@wing328 so for example before if we had this enum in swagger:

"Format": {
"type": "string",
"enum": ["plain","html","template"]
}

the code was generating:

public var Format: Format

which would create a swift compiler error. I made a fix to escape the enum name so we would have:

public var Format: _Format

and _Format would define the enumeration. But then we started camel casing swift variable names so without my newest fix you'd have:

public var format: _Format

but the escaping is unnecessary in this case - with this change you'll get:

public var format: Format

[jaz-ah]

@wing328 let me know if this makes sense ^^

[wing328]

@jaz-ah I need more time to review. We've a major PR for enum: #2508

I need to make sure enum support in other langauges do not have similar issue.

[jaz-ah]

@wing328 no prob

[wing328]

@jaz-ah PR merged. Sorry for taking this long.