[birt-dev] Check in: update performance test suite

["Xiang Li" <xiang.li@xxxxxxxxxxx>]

- Summary:

update performance test suite

- SCR(s) Resolved:

NA

- Description:

update performance test suite

- set engine logging level to off

- close document when render is completed

- Regression ( Yes/No ):

No

- Code Owner:

Xiang Li

- Code Reviewers:

Houqiang Yan

- Tests:

Manual

File edited:

/org.eclipse.birt.test.performance/src/org/eclipse/birt/test/performance/ExecutionContext.java

/org.eclipse.birt.test.performance/src/org/eclipse/birt/test/performance/RenderThread.java