tests: unify qemu binary paths for all qemu related tests

Our test data used a lot of different qemu binary paths and some
of them were based on downstream systems.

Note that there is one file where I had to add "accel=kvm" because
the qemuargv2xml code parses "/usr/bin/kvm" as virt type="kvm".

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

tests/domainsnapshotxml2xmlout/disk_snapshot_redefine.xml

@@ -39,7 +39,7 @@
     <on_reboot>restart</on_reboot>
     <on_crash>destroy</on_crash>
     <devices>
-      <emulator>/usr/bin/qemu</emulator>
+      <emulator>/usr/bin/qemu-system-i686</emulator>
       <disk type='block' device='disk'>
         <source dev='/dev/HostVG/QEMUGuest1'/>
         <target dev='hda' bus='ide'/>

tests/domainsnapshotxml2xmlout/external_vm_redefine.xml

@@ -29,7 +29,7 @@
     <on_reboot>restart</on_reboot>
     <on_crash>destroy</on_crash>
     <devices>
-      <emulator>/usr/bin/qemu</emulator>
+      <emulator>/usr/bin/qemu-system-i686</emulator>
       <disk type='block' device='disk' snapshot='no'>
         <source dev='/dev/HostVG/QEMUGuest1'/>
         <target dev='hda' bus='ide'/>

tests/domainsnapshotxml2xmlout/full_domain.xml

@@ -22,7 +22,7 @@
     <on_reboot>restart</on_reboot>
     <on_crash>destroy</on_crash>
     <devices>
-      <emulator>/usr/bin/qemu</emulator>
+      <emulator>/usr/bin/qemu-system-i686</emulator>
       <disk type='block' device='disk'>
         <source dev='/dev/HostVG/QEMUGuest1'/>
         <target dev='hda' bus='ide'/>

tests/domainsnapshotxml2xmlout/metadata.xml

@@ -26,7 +26,7 @@
     <on_reboot>restart</on_reboot>
     <on_crash>destroy</on_crash>
     <devices>
-      <emulator>/usr/bin/qemu</emulator>
+      <emulator>/usr/bin/qemu-system-i686</emulator>
       <disk type='block' device='disk'>
         <source dev='/dev/HostVG/QEMUGuest1'/>
         <target dev='hda' bus='ide'/>