testcase_98_kernel_upgade_pre.py introduced
testcase_36_ebs.py: fix forgotten print
valid_runner.py: --disable-stages introduced
x86_64_hvm_kernel.yaml introduced
testcase_25_uname.py: run in stage1 as well
hwp/x86_64_hvm_kernel.yaml: fix typo
x86_64_hvm_kernel.yaml: remove all but one ephemerals