Make the code more readable

Signed-off-by: Akendo <akendo@akendo.eu>

features/base/test/test_metadata_connection.py

@@ -4,9 +4,15 @@
 
 def test_metadata_connection(client, non_azure, non_ali, non_chroot, non_kvm):
     metadata_host = "169.254.169.254"
+    # request the IMDSv2 token to allow access to the metadata_host on AWS.
+    (exit_code, token, error) = client.execute_command(
+            f"curl -sqX PUT 'http://{metadata_host}/latest/api/token'\
+                    -H 'X-aws-ec2-metadata-token-ttl-seconds:60'"
+    )
     (exit_code, output, error) = client.execute_command(
         f"wget --timeout 5 \
-               --header=\"X-aws-ec2-metadata-token: $(curl -sqX PUT 'http://{metadata_host}/latest/api/token' -H 'X-aws-ec2-metadata-token-ttl-seconds: 21600')\" \
+               --header='X-aws-ec2-metadata-token: {token}' \
+               -H 'X-aws-ec2-metadata-token-ttl-seconds:60' \
                'http://{metadata_host}/'"
     )
     assert exit_code == 0, f"no {error=} expected"