master-qa-10965

https://issues.liferay.com/browse/LIFERAYQA-10965

This fixes the following backend failure. I was able to reproduce it on ee-6.2.x and the test passes after this change.
```
[junit] Running com.liferay.portal.tools.sourceformatter.SourceFormatterTest
[junit] Testsuite: com.liferay.portal.tools.sourceformatter.SourceFormatterTest
[junit] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 32.831 sec
[junit] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 32.831 sec
[junit]
[junit] Testcase: testSourceFormatter(com.liferay.portal.tools.sourceformatter.SourceFormatterTest):        FAILED
[junit] portal-web/test/functional/com/liferay/portalweb/portal/util/liferayselenium/WebDriverToSeleniumBridge.java expected:<...DestinationObject);
[junit] [
[junit]             x -= WebDriverHelper.getElementPositionCenterX(
[junit]                     this, locatorOfObjectToBeDragged);
[junit]
[junit]             int y = WebDriverHelper.getElementPositionCenterY(
[junit]                     this, locatorOfDragDestinationObject);
[junit] ]
[junit]             y -= WebDriverHel...> but was:<...DestinationObject);
[junit] [
[junit]             x -= WebDriverHelper.getElementPositionCenterX(
[junit]                     this, locatorOfObjectToBeDragged);
[junit]
[junit]             int y = WebDriverHelper.getElementPositionCenterY(
[junit]                     this, locatorOfDragDestinationObject);
[junit]             ]
[junit]             y -= WebDriverHel...>
[junit] junit.framework.AssertionFailedError: portal-web/test/functional/com/liferay/portalweb/portal/util/liferayselenium/WebDriverToSeleniumBridge.java expected:<...DestinationObject);
[junit] [
[junit]             x -= WebDriverHelper.getElementPositionCenterX(
[junit]                     this, locatorOfObjectToBeDragged);
[junit]
[junit]             int y = WebDriverHelper.getElementPositionCenterY(
[junit]                     this, locatorOfDragDestinationObject);
[junit] ]
[junit]             y -= WebDriverHel...> but was:<...DestinationObject);
[junit] [
[junit]             x -= WebDriverHelper.getElementPositionCenterX(
[junit]                     this, locatorOfObjectToBeDragged);
[junit]
[junit]             int y = WebDriverHelper.getElementPositionCenterY(
[junit]                     this, locatorOfDragDestinationObject);
[junit]             ]
[junit]             y -= WebDriverHel...>
[junit]     at com.liferay.portal.tools.sourceformatter.SourceFormatterTest.testSourceFormatter(SourceFormatterTest.java:34)
[junit]
[junit]
[junit] TEST com.liferay.portal.tools.sourceformatter.SourceFormatterTest FAILED
[junit] Tests FAILED
```