Let cts can skip commented cases in caselist file

[julizhan]

Add a new else if in parseCaseList() to skip commented line of caselist file. With this we can skip some less important test cases that may cause system hang or crash and let the whole test finish.

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[julizhan]

@lordalcol @nico @ShabbyX Would you mind help to review this patch?

[ShabbyX]

This probably works ok for a while, but wouldn't it be a hassle to keep the mustpass list in sync with upstream where you have locally / downstream commented some lines out?

May I suggest instead adding a step to your CI / runner that would:

• Read the mustpass file
• Read a file of suppressions / known failures / etc
• Generate a new mustpass file with some lines removed based on the second file
• Pass that new mustpass file to the CTS runner

The advantage of doing the above is that you have more control over how to suppress tests. For example, the suppression file could include globs (like test.prefix.*) and the generator could automatically remove all those tests without you having to comment them out one by one.