test: rework run_qemu

It tries to find a suitable QEMU binary and will use KVM if present.
We can now configure QEMU from outside with 4 variables :
  - $QEMU_BIN : path to QEMU's binary
  - $KERNEL_APPEND : arguments appended to kernel cmdline
  - $KERNEL_BIN : path to a kernel
    Default /boot/vmlinuz-$KERNEL_VER
  - $INITRD : path to an initramfs
    Default /boot/initramfs-${KERNEL_VER}.img
  - $QEMU_SMP : number of CPU simulated by QEMU.
    Default 1

(from Alexander Graf's script: http://www.spinics.net/lists/kvm/msg72389.html)

1 files changed, 2 insertions, 6 deletions

diff --git a/test/TEST-01-BASIC/test.sh b/test/TEST-01-BASIC/test.sh
index aaf63f4f52..84ccf26f2e 100755
--- a/test/TEST-01-BASIC/test.sh
+++ b/test/TEST-01-BASIC/test.sh
@@ -5,9 +5,6 @@ TEST_DESCRIPTION="Basic systemd setup"
 
 . $TEST_BASE_DIR/test-functions
 
-# Uncomment this to debug failures
-#DEBUGFAIL="systemd.unit=multi-user.target"
-
 check_result_qemu() {
     ret=1
     mkdir -p $TESTDIR/root
@@ -23,11 +20,10 @@ check_result_qemu() {
 }
 
 test_run() {
-    if check_qemu ; then
-        run_qemu
+    if run_qemu; then
         check_result_qemu || return 1
     else
-        dwarn "can't run qemu-kvm, skipping"
+        dwarn "can't run QEMU, skipping"
     fi
     if check_nspawn; then
         run_nspawn