Replace -c parameter with --config

Also, reformat the invocation of Lorax, since
Lorax does not accept -c=%s, only -c %s.

Jira: RHELCMP-713
Signed-off-by: Bohdan Khomutskyi <bkhomuts@redhat.com>

pungi/wrappers/lorax.py

@@ -100,7 +100,9 @@ class LoraxWrapper(object):
             cmd.append("--squashfs-only")
 
         if configuration_file:
-            cmd.append("-c=%s" % configuration_file)
+            # Note, at the moment Lorax does not accept --config=%s
+            cmd.append("--config")
+            cmd.append(configuration_file)
         output_dir = os.path.abspath(output_dir)
         cmd.append(output_dir)
 

tests/test_lorax_wrapper.py

@@ -88,7 +88,8 @@ class LoraxWrapperTest(unittest.TestCase):
                 "--dracut-arg=--foo",
                 "--dracut-arg=bar",
                 "--squashfs-only",
-                "-c=/storage/RHEL-7.8-20200731.n.0/"
+                "--config",
+                "/storage/RHEL-7.8-20200731.n.0/"
                 + "logs/x86_64/buildinstall-Server-logs/lorax.conf",
                 "/mnt/output_dir",
             ],