What this PR does / why we need it:
Currently, this repo use the apachev2.0 as the lincese. As openeuler community encourage to use MULAN, this pr propose to update the license to MULAN v1.0

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

Release note: