LPS-52131 SampleSQLBuilder initialization race condition, caused by LPS-...

...37672 b63c1480625f0e09e1c9a13825e2a0aec97a1e8e

Fix for http://test-1-7/job/test-portal-pullrequest-backend%28master%29/group=0,label_exp=!test-1-7/6/testReport/junit/com.liferay.portal.tools.samplesqlbuilder/SampleSQLBuilderTest/testGenerateAndInsertSampleSQL/