修改es安全模式下，未配置证书地址，则不进行证书验证

[cbc666]

What type of PR is this?

bug

What does this PR do / why do we need it:

修改es安全模式下，未配置证书地址，连接es报错证书错误

Which issue(s) this PR fixes:

Fixes # 修改es安全模式下，未配置证书地址，则不进行证书验证

Special notes for your reviewers:

[it-is-a-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[it-is-a-robot]

Welcome @cbc666!

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[cbc666]

/check-cla

[cbc666]

check-cla

[cbc666]

/assign @fbird2020

[chenzeng765]

/check-cla

[it-is-a-robot]

@cbc666, thanks for your pull request. All authors of the commits have signed the CLA. :wave: