[MINOR] update the license and add the third party license files#657

Merged

xwm1992 merged 11 commits intoapache:developfrom xwm1992:develop

Dec 16, 2021

Commits on Dec 14, 2021

Merge branch 'develop' of https://github.com/apache/incubator-eventmesh into develop
xwm1992
committed
[ISSUE apache#405 ] remove some unused code
xwm1992
committed

Commits on Dec 15, 2021

Merge branch 'develop' of https://github.com/apache/incubator-eventmesh into develop
xwm1992
committed
[MINOR] supply the license and update the third party license file name
xwm1992
committed

Commits on Dec 16, 2021