Acceptance Tests: fix population of public key in cloudinit image

Currently the path of the ssh public key is being set, but its
content is obviously what's needed.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20210203172357.1422425-18-crosa@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Signed-off-by: Cleber Rosa <crosa@redhat.com>

tests/acceptance/avocado_qemu/__init__.py

@@ -290,13 +290,15 @@ def prepare_cloudinit(self, ssh_pubkey=None):
         try:
             cloudinit_iso = os.path.join(self.workdir, 'cloudinit.iso')
             self.phone_home_port = network.find_free_port()
+            with open(ssh_pubkey) as pubkey:
+                pubkey_content = pubkey.read()
             cloudinit.iso(cloudinit_iso, self.name,
                           username='root',
                           password='password',
                           # QEMU's hard coded usermode router address
                           phone_home_host='10.0.2.2',
                           phone_home_port=self.phone_home_port,
-                          authorized_key=ssh_pubkey)
+                          authorized_key=pubkey_content)
         except Exception:
             self.cancel('Failed to prepare the cloudinit image')
         return cloudinit_iso