[SCB-1305] CseAysncRestTemplate is not set headers

[wangshenggh]

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[coveralls]

Coverage increased (+0.02%) to 85.689% when pulling 6b6947b on wangshenggh:master into 80a13dd on apache:master.

[wujimin]

please add integration test.

[heyile]

UT should cover all the scenes that we may meet.