[PATCH 01/11] testsuite: Fix failing hostname service in qemu guest

[Uladzimir Bely <ubely@ilbers.de>]

Hostname service in qemu may fail due to namespace issues. It happens
only when qemu subprocess run with `shell=False` (default).

```
systemctl status systemd-hostnamed.service
...
Failed to set up mount namespacing: /run/systemd/unit-root/dev:
     Read-only file system
Failed at step NAMESPACE spawning /lib/systemd/systemd-hostnamed:
    Read-only file system
Main process exited, code=exited, status=226/NAMESPACE
...
```
The issue was caught in a downstream, not Isar image itself.

Signed-off-by: Uladzimir Bely <ubely@ilbers.de>
---
 testsuite/cibuilder.py | 5 +++--
 testsuite/start_vm.py  | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/testsuite/cibuilder.py b/testsuite/cibuilder.py
index 2e4702ac..6a3cf052 100755
--- a/testsuite/cibuilder.py
+++ b/testsuite/cibuilder.py
@@ -253,8 +253,9 @@ class CIBuilder(Test):
 
         timeout = time.time() + int(time_to_wait)
 
-        p1 = subprocess.Popen(cmdline, stdout=subprocess.PIPE,
-                              stderr=subprocess.PIPE, universal_newlines=True)
+        p1 = subprocess.Popen('exec ' + ' '.join(cmdline), shell=True,
+                              stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+                              universal_newlines=True)
         try:
             poller = select.poll()
             poller.register(p1.stdout, select.POLLIN)
diff --git a/testsuite/start_vm.py b/testsuite/start_vm.py
index 593e2607..82fe489e 100755
--- a/testsuite/start_vm.py
+++ b/testsuite/start_vm.py
@@ -92,7 +92,7 @@ def start_qemu(arch, build, distro, out, pid, enforce_pcbios):
     cmdline.insert(1, '-nographic')
 
     print(cmdline)
-    p1 = subprocess.call(cmdline)
+    p1 = subprocess.call('exec ' + ' '.join(cmdline), shell=True)
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
-- 
2.20.1