KubeEdge v1.4.0-beta.0 release

Notable Changes

• Keadm: support raspbian (#1779, @daixiang0)
• Implement device management enhance (#1790, @luogangyi)
• Support edge certificate rotation (#1838, @XJangel)
• Add tree to store copy of dependency's license (#1847, @kevin-wangzefeng)
• add garbage collection of reliablesyncs when node unregisters (#1855, @ls889)
• fix too long time to get node ready when reconnect (#1670, @fisherxu)
• fix cpu limit does not take effect issue (#1866, @Baoqiang-Zhang)
• Auto detect sandbox image (#1874, @daixiang0 )
• Run edgecore as system service (#1962, @dingyin)
• Update vendor to Kubernetes 1.18 (#1982, @dingyin)
• extend property types (#2014, @luogangyi)

Bug fixs

• fix wrong use of e.namespace when get imagePullSecret (#1765, @GsssC)
• fix wrong parse operation when service url is short (#1775, @XiaoJiangWang)
• delay the volume mount until the pods are retrieved from metaManger and added to managers when edgecore starts (#1809, @GsssC)
• edged.go: Fix pod sync copied from kubelet (#1819, @faicker)
• Improve metrics connection (#1887, @Poor12)
• fix use certificate from local directory problem (#1925, @threestoneliu)
• Process of bluetooth mapper scheduler seems wrong (#1940, @sailorvii)
• Fix device configMap can not be re-created (#1949, @daixiang0)
• fixed goroutine leak, when ws connection reconnect, but fifo's channel no close (#2019, @loongify)