Various RHUI Related Repository Tests

Tests for RHUI 3 repos and EUS listings

rhui3_tests.test_rhui_3_repos.setup()

announce the beginning of the test run

rhui3_tests.test_rhui_3_repos.teardown()

announce the end of the test run

rhui3_tests.test_rhui_3_repos.test_01_rhui_3_for_rhel_7_check()

check if the RHUI 3 packages for RHEL 7 are available

rhui3_tests.test_rhui_3_repos.test_02_eus_6_repos_check()

check if all supported RHEL 6 EUS versions are available

rhui3_tests.test_rhui_3_repos.test_03_eus_7_repos_check()

check if all supported RHEL 7 EUS versions are available