cve-check: update class

Update the class to OE-core 6002bdc77643c363a8326bf163baecba8b36e3e0.

This includes:
- inclusive language changes
- the rework of the database lock

Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
Signed-off-by: Marta Rybczynska <rybczynska@gmail.com>