fix: retrying when server connection hangs (merged from trunk)

...isd.authentication.crowd.RealCrowdAuthenticationTest.html

...thentication.crowd.RealCrowdAuthenticationTest.properties

...cisd.authentication.crowd.RealCrowdAuthenticationTest.xml

authentication/test-output/authentication/classes.html

authentication/test-output/authentication/groups.html

authentication/test-output/authentication/index.html

authentication/test-output/authentication/main.html

...tion/test-output/authentication/methods-alphabetical.html

...ntication/test-output/authentication/methods-not-run.html

authentication/test-output/authentication/methods.html

...ntication/test-output/authentication/reporter-output.html

authentication/test-output/authentication/testng-failed.xml

authentication/test-output/authentication/testng.xml.html

authentication/test-output/authentication/toc.html

authentication/test-output/emailable-report.html

authentication/test-output/index.html

authentication/test-output/testng-failed.xml

authentication/test-output/testng-results.xml

authentication/test-output/testng.css