RFR: 8255489: Unify the parsing of @lambda-proxy and @lambda-form-invokers tags in a classlist [v3]

[Yumin Qi]

On Fri, 30 Oct 2020 20:27:09 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

>> With this change, the parsing of the `@lambda-proxy` and the `@lambda-form-invokers` tags in a classlist will be performed in the same function - `ClassListParser::parse_at_tags()`.
>> 
>> Also removing the `:` of the `@lambda-proxy:` to be consistent with the `@lambda-form-invokers `tag.
>> 
>> Ran tiers 1 through 4 tests successfully.
>
> Calvin Cheung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add invalid @ tag tests

LGTM.

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Marked as reviewed by minqi (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/942