fix(test): use the name of the CPU template to find exceptions

Commit c44b0c6 was refactored in such a way that we could not find an
exception for custom CPU templates. It was probably not noticed since
the it requires a specific CPU in m5d.

Fixes: c44b0c6

Signed-off-by: Pablo Barbáchano <[email protected]>

Author: pb8o

tests/integration_tests/security/test_vulnerabilities.py

@@ -56,7 +56,9 @@ def configure_microvm(
     microvm.basic_config(vcpu_count=2, mem_size_mib=256, cpu_template=cpu_template)
     if custom_cpu_template:
         microvm.api.cpu_config.put(**custom_cpu_template["template"])
-    microvm.cpu_template = cpu_template or custom_cpu_template
+    microvm.cpu_template = cpu_template
+    if cpu_template is None and custom_cpu_template is not None:
+        microvm.cpu_template = custom_cpu_template["name"]
     microvm.add_net_iface()
     microvm.start()
     return microvm