fixes import for hyper-v generation 2 VMs
remove vm by default when using docker run
Merge pull request #4327 from parisholley/dockerRunRm

providers/docker: Clean docker containers when calling vagrant docker-run
Update CHANGELOG
Merge pull request #4324 from mwrock/generation

providers/hyper-v: fixes import for hyper-v generation 2 VMs
Update CHANGELOG
core: don't load curlrc [GH-4328]
core: disallow brackets in VM names [GH-4319]
core: don't allow '/' in VM name [GH-4289]