devstack installation fails on golang installation

[kimminsookinx]

++/opt/stack/skydive/devstack/plugin.sh:install_go:98 curl -s -L https://storage.googleapis.com/golang/go1.14.x.linux-amd64.tar.gz +++/opt/stack/skydive/devstack/plugin.sh:install_go:98 dirname /opt/go ++/opt/stack/skydive/devstack/plugin.sh:install_go:98 tar -C /opt -xzf -

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now

caused by no such tar for golang

proposed change

add a patch version for golang 1.14 @ skydive/devstack/plugin.sh ln:9

such as

# golang version. Skydive needs at least version 1.14
GO_VERSION=${GO_VERSION:-1.14.15}