refs #3227 improved / added more integration tests

tests/PHPUnit/Integration/ApiGetReportMetadataTest.php

tests/PHPUnit/Integration/ApiGetReportMetadata_yearTest.php

tests/PHPUnit/Integration/CsvExportTest.php

tests/PHPUnit/Integration/EcommerceOrderWithItemsTest.php

tests/PHPUnit/Integration/FlattenReportsTest.php

tests/PHPUnit/Integration/LabelFilterTest.php

tests/PHPUnit/Integration/NoVisitTest.php

...gration/OneVisitorOneWebsite_SeveralDaysDateRangeTest.php

...torOneWebsite_SeveralDaysDateRange_ArchivingTestsTest.php

tests/PHPUnit/Integration/OneVisitorTwoVisitsTest.php

...Integration/OneVisitorTwoVisits_withCookieSupportTest.php

.../PHPUnit/Integration/OneVisitor_LongUrlsTruncatedTest.php

...PHPUnit/Integration/OneVisitor_NoKeywordSpecifiedTest.php

...on/PeriodIsRange_DateIsLastN_MetadataAndNormalAPITest.php

.../PHPUnit/Integration/TwoVisitsWithCustomVariablesTest.php

...nit/Integration/VisitsInPast_InvalidateOldReportsTest.php

tests/PHPUnit/IntegrationTestCase.php