[bugfix]Tag with empty value Shouldn't transform to Tag:

[JavaProgrammerLB]

What's changed?

Fix the issue

What is the bug

When I set Tag's name to 'TEST' and value to ''，I expect to get TEST Tag, but sometime(when tag's value has set a value then delete the value to empty String) I get TEST:(with colon)

How to fix the bug

• If the value is empty String('')，set the value to null

Effect

Checklist

• I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

Add or update API

• I have added the necessary e2e tests and all cases have passed.

[tomsun28]

lgtm!👍