fix TemplateUtils usage

[shalk]

Please do not create a Pull Request without creating an issue first.

What is the purpose of the change

• fix source.trim() if source is null
• call TenantUtil.getUserTenantForAcm() directly when namespaceTmp is null

Brief changelog

XX

Verifying this change

XXXX

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[KomachiSion]

I think this PR is no meaningful,

Reason is TemplateUtils.java will use isBlank and isEmpty to check source fist, if source is null, source.trim will not be called.

[KomachiSion]

Why change this code?

[shalk]

line 160 String namespaceTmp = null , namespace is null here, stringBlankAndThenExecute is redundant

[shalk]

line 160 String namespaceTmp = null , namespace is null here, stringBlankAndThenExecute is redundant

[shalk]

isBlank

I think this PR is no meaningful,

Reason is TemplateUtils.java will use isBlank and isEmpty to check source fist, if source is null, source.trim will not be called.

When callable.call throw exception and source is null , npe will be throw.

[KomachiSion]

OK.