bugfix: use a fixed version of cni instead of the branch of master

[starnop]

Signed-off-by: Starnop [email protected]

Ⅰ. Describe what this PR did

We use the master branch of containernetworking/plugins when install cni , with this PR containernetworking/plugins#219 submitted, we got error info when running the test about cri

install cni...
hack/install/install_cni.sh: line 26: /home/travis/gopath/src/github.com/containernetworking/plugins/build.sh: No such file or directory
make: *** [cri-v1alpha1-test] Error 1

It's so not make sense. We should fix the version that we use instead of relying heavily on the latest Pull Request and upgrade the version manually when we need it.

Ⅱ. Does this pull request fix one issue?

None.

Ⅲ. Why don't you add test cases (unit test/integration test)? (你真的觉得不需要加测试吗？)

None.

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[chuanchang]

@starnop IMO, it had better to keep consistent with upstream, you know the cni plugin will constantly change, so I think it's not a good idea to give fixed version, what do you think?

BTW, I have an another #2452 to fix it.

[mathspanda]

If fix cni version, we can just download releases from https://github.com/containernetworking/plugins/releases/download/${CNI_VERSION}/cni-plugins-amd64-${CNI_VERSION}.tgz

[starnop]

In fact, the size of the source code package is smaller than the size of the .tgz. In addition, we will be freedom to operate the branch . So no need to change it, IMO. WDYT? Anyway, thanks for your advice. :)

[fuweid]

@starnop IMO, it had better to keep consistent with upstream, you know the cni plugin will constantly change, so I think it's not a good idea to give fixed version, what do you think?

I think we should use the stable version here because the change maybe unstable in master.

[fuweid]

LGTM