tst_enginioclient fails on Red Hat 6.6_x64

QtQA::App::TestRunner: begin tst_enginioclient: [./tst_enginioclient] [-silent] [-o] [/work/ci/qt/qt5/dev/_artifacts/test-logs/tst_enginioclient-testresults-00.xml,xml] [-o] [-,txt]
Could not open a file "/home/qt/enginio/credentials" . Backend setup failed!
Testing tst_EnginioClient
FAIL! : tst_EnginioClient::initTestCase() '_backendManager.createBackend(_backendName)' returned FALSE. ()
Loc: [tst_enginioclient.cpp(126)]
FAIL! : tst_EnginioClient::cleanupTestCase() '_backendManager.removeBackend(_backendName)' returned FALSE. ()
Loc: [tst_enginioclient.cpp(182)]
Totals: 0 passed, 2 failed, 0 skipped, 0 blacklisted
QtQA::App::TestRunner: test failed, running again to see if it is flaky...
Could not open a file "/home/qt/enginio/credentials" . Backend setup failed!

• • • • • • • • • Start testing of tst_EnginioClient *********

• • • • • • • • • Finished testing of tst_EnginioClient *********
                  QtQA::App::TestRunner: test failure could be reproduced twice consecutively
                  QtQA::App::TestRunner: end tst_enginioclient: 1 seconds, exit code 2
                  QtQA::App::TestScheduler: tst_enginioclient failed