test.cli_network_test: fix TestNetworkDefault failure on Ubuntu

[chuanchang]

The command output of "ip r | grep default" contains extra "proto static" on Ubuntu host, which is inconsistent with output in container, the actual error as follows:

FAIL: cli_network_test.go:59: PouchNetworkSuite.TestNetworkDefault

cli_network_test.go:101:
    c.Assert(err, check.IsNil)
... value *errors.errorString = &errors.errorString{s:"\nCommand:  /usr/local/bin/pouch run --name TestNetworkDefault --net host registry.hub.docker.com/library/busybox:1.28 ip r\nExitCode: 0\nError:    <nil>\nStdout:   default via 10.0.2.2 dev enp0s3  metric 100 \n10.0.2.0/24 dev enp0s3 scope link  src 10.0.2.15  metric 100 \n169.254.0.0/16 dev enp0s8 scope link  metric 1000 \n192.168.5.0/24 dev p0 scope link  src 192.168.5.1 \n192.168.56.0/24 dev enp0s8 scope link  src 192.168.56.101  metric 100 \n\nStderr:   \n\nFailures:\nExpected stdout to contain \"default via 10.0.2.2 dev enp0s3   metric 100 \\n\""} ("\nCommand:  /usr/local/bin/pouch run --name TestNetworkDefault --net host registry.hub.docker.com/library/busybox:1.28 ip r\nExitCode: 0\nError:    <nil>\nStdout:   default via 10.0.2.2 dev enp0s3  metric 100 \n10.0.2.0/24 dev enp0s3 scope link  src 10.0.2.15  metric 100 \n169.254.0.0/16 dev enp0s8 scope link  metric 1000 \n192.168.5.0/24 dev p0 scope link  src 192.168.5.1 \n192.168.56.0/24 dev enp0s8 scope link  src 192.168.56.101  metric 100 \n\nStderr:   \n\nFailures:\nExpected stdout to contain \"default via 10.0.2.2 dev enp0s3   metric 100 \\n\"")

OOPS: 0 passed, 1 FAILED
--- FAIL: Test (1.46s)

Signed-off-by: Alex Jia chuanchang.jia@gmail.com

Ⅰ. Describe what this PR did

to remove extra "proto static" string of "ip r" output on Ubuntu host

Ⅱ. Does this pull request fix one issue?

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

cd test && go test -v -check.f PouchNetworkSuite.TestNetworkDefault

Ⅴ. Special notes for reviews

[Letty5411]

LGTM

[codecov-io]

Codecov Report

Merging #2170 into master will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2170      +/-   ##
==========================================
- Coverage   64.31%   64.28%   -0.04%     
==========================================
  Files         209      209              
  Lines       16725    16725              
==========================================
- Hits        10757    10751       -6     
- Misses       4638     4641       +3     
- Partials     1330     1333       +3

Flag	Coverage Δ
#criv1alpha1test	32.97% <ø> (+0.04%)	⬆️
#criv1alpha2test	33.56% <ø> (+0.01%)	⬆️
#integrationtest	39.22% <ø> (-0.01%)	⬇️
#unittest	23.9% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
ctrd/image.go	77.19% <0%> (-1.76%)	⬇️
daemon/logger/jsonfile/utils.go	71.54% <0%> (-1.63%)	⬇️
cri/v1alpha1/cri.go	63.05% <0%> (-0.35%)	⬇️
daemon/mgr/container.go	56.77% <0%> (ø)	⬆️
apis/server/utils.go	66.66% <0%> (+4.76%)	⬆️