missing cniVersion in Flannelconf

[obeyler]

cniVersion is missing in current flannel conf inside cfcr

see documentation of flannel
https://github.com/coreos/flannel/blob/960b3243b9a7faccdfe7b3c09097105e68030ea7/Documentation/kube-flannel.yml#L106-L111

and the implementation in CFCR:

kubo-release/jobs/flanneld/templates/bin/flanneld_ctl.erb

Lines 49 to 51 in a9c5063

	{
	"name": "flannel-network",
	"plugins": [

see also this bug in ref:
flannel-io/flannel#1178
containerd/containerd#4012
(many thanks @fuweid )
flannel-io/flannel#1186

please rename also the CNI_VERSION to CNI_PLUGIN_VERSION

kubo-release/packages/cni/packaging

Lines 5 to 10 in a9c5063

	CNI_PACKAGE="cni-plugins"
	CNI_VERSION="0.7.1"
	tar -xzf cni/${CNI_PACKAGE}-amd64-${CNI_VERSION}.tgz -C ${BOSH_INSTALL_TARGET}/bin/
	mkdir -p utillocal

as CNI_VERSION != CNI_PLUGIN_VERSION
cni plugin version 0.7.1 => cni version 0.3.1

What happened:
The cniVersion is missing so on the containerd is not able to finish properly the sandbox network
so on the result is lot of instability in docker or in containerd

time="2020-02-11T10:34:26.460462685Z" level=error msg="StopPodSandbox for \"38e9c87cf8515b4771a05efc2617298034d27cfd920df62b03deda34a548774a\" failed" error="failed to destroy network for sandbox \"38e9c87cf8515b4771a05efc2617298034d27cfd920df62b03deda34a548774a\": invalid version \"\": the version is empty"
time="2020-02-11T10:35:54.546984702Z" level=error msg="StopPodSandbox for \"486b5f22fb4782d02b633f0108fa6eafdde3c5996f0e2a8f3e6a39ae4929e779\" failed" error="failed to destroy network for sandbox \"486b5f22fb4782d02b633f0108fa6eafdde3c5996f0e2a8f3e6a39ae4929e779\": invalid version \"\": the version is empty"

Environment:
CFCR 0.36