SPARK-8918 Add @since tags to mllib.clustering

[XiaoqingWang]

No description provided.

[mengxr]

ok to test

[mengxr]

@yu-iskw Could you help review this PR? Thanks!

[SparkQA]

Test build #38821 has finished for PR 7662 at commit d8729a3.

• This patch fails Scala style tests.
• This patch merges cleanly.
• This patch adds no public classes.

[yu-iskw]

Alright. I'll check this PR later.

[yu-iskw]

@XiaoqingWang thank you for the contribution! And sorry for the delay of my response. It seems that you added the annotations based on branch-1.4. However, such a GaussianMixtureModel.predict(point: Vector) method doesn't exist on the mater branch. I have no idea why SPARK-8481 wasn't merged into the mater branch. I am asking that to @jkbradley at #6906.

Apart from that, it seems that you try to merge this PR into branch-1.4. According to JIRA, the target version SPARK-8918 is 1.5.0. I think you should implement this PR based on the master branch and send a PR to the master branch.

Could you close this PR and then resend a new one to change the target branch. Since we can't change the target branch after sending a PR. And you should add annotations based on the master branch. Thanks!

[mengxr]

@XiaoqingWang Could you send a new PR to the master branch as @yu-iskw suggested? We should get this merged before the 1.5 RC release.

[jkbradley]

Pinging for updates (Thanks!)

[mengxr]

I'm taking this PR over. Thanks @XiaoqingWang for making the initial pass!

[XiaoqingWang]

a new pull request (#8229) for this has been submited,I am sorry for the delay,please help to review ,thanks