add :environment to test:scm:setup:create_dir and test:scm:update rake tasks (#16881)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013135
split method for scm test repository extracting (#16881)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013136