Skip test_created_server_uefi when barbican integration enabled

Skip because test creates image which should be signed.

Related-Prod: PRODX-29452
Change-Id: I2131347a993f4551bdfc66a4a717e746ee4c692f
(cherry picked from commit f776716a2e3b78bd0b7be495c003aac92f59185d)
1 file changed