Development 2 build 4

Changed

Build: Update buildroot 2018.11.0
Build: Support VDI, VDHX, VMDK
Build: Validate scripts with Travis
OS: Docker update to version 18.09.0
OS: Move service scripts into libexec
OS: Don't use a bind mount for docker data
OVA: Add driver support for Xen, Hyper-V
OdroidC2: Updating Kernel 4.18.20