clear_claimed_marks() can be done in parallel.
            
- duplicates
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                    JDK-8159984 Remove call to ClassLoaderDataGraph::clear_claimed_marks during the initial mark pause -           
- Resolved
 
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- is blocked by
- 
                    JDK-8159984 Remove call to ClassLoaderDataGraph::clear_claimed_marks during the initial mark pause -           
- Resolved
 
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- relates to
- 
                    JDK-8160055 Misplaced call to ClassLoaderDataGraph::clear_claimed_marks during initial mark -           
- Resolved
 
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