valid_runner.py: fix bug introduced in 394be2061d6b7425abd64903c704ec19d9a607fb
testcase_26_verify_rpms.py: workaround 6.4 issue
testcase_30_rhn_certificates.py: 7 years for 6.4 (not fixed yet)
testcase_31_subscription_management.py: not fixed for 6.4
wip
add custom email subject
valid_runner.py: include overall result in email subject
testcase_98_kernel_upgrade_pre.py: install kernels with rpm
tcase_90_2_cgroups_kernel_bug914737: use C memhog from drjones