Update tests [1][2] always removes all update sites before testing update but this is wrong approach. It should also add oxygen staging update site.

[1] https://dev-platform-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/user/lvalach/my-views/view/My%20Jobs/job/Devstudio_Installation/job/Post_install_tests/job/Update_Devstudio_test/
[2] https://dev-platform-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/user/lvalach/my-views/view/My%20Jobs/job/Devstudio_Installation/job/Post_install_tests/job/Update_JBossTools_test/