This env is the workaroud of dns resolver on golang 1.7.3.
Remove it is bacause of harbor is using golang 1.9.2, the bug
has already been fixed.
Signed-off-by: wang yan <wangyan@vmware.com>
1. Update the nginx.conf
2. Update Makefile
3. Update docker-compose
4. Update image name
5. Rename folder ui to core
6. Change the harbor-ui's package name to core
7. Remove unused static file on harbor-core
8. Remove unused code for harbor-portal
Signed-off-by: Qian Deng <dengq@vmware.com>