fix(java): relax license header replacement regex and use current year (#383)
fix(java): relax license header replacement regex and use current year (#383)

* fix(java): relax license header replacement regex and use current year

* fix: hardcode 2020 as the license year

* chore: remove unused import

googleapis/synthtool,googleapis/synthtool,googleapis/synthtool,googleapis/synthtool,googleapis/synthtool