v21.03.15

Changelog

1ee5e6f add ERU_CPU env to containers for their perception
2825832 add test cases, resolve dead lock
21bc787 bulky operate remove and diss by node
6d2d3ef cluster layer calls remap on resource changes
6825f39 fix after_create hook
f1a5a3c fix embeded etcd issue for tests
cd04cf4 fix: missing wal while make
5944f69 force logging with color
8754425 implement RemapResource for docker engine
113786d intro goroutine pool to restrain max concurrency
f67f8af keep error log stack concise
da7a7e3 pass unittests
2ec7b86 stipulate engine interface: ResourceRemap