tests/avocado: Allow overwrite smp and memory size command line options

Removes the hard-coded values in setUp(). Class inheriting from
avocado_qemu.LinuxTest can overwrite the default smp and memory instead.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/453
Signed-off-by: Ahmed Abouzied <email@aabouzied.com>
Message-Id: <20210802222257.50946-1-email@aabouzied.com>
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/avocado/avocado_qemu/__init__.py

@@ -516,6 +516,8 @@ class LinuxTest(LinuxSSHMixIn, QemuSystemTest):
     distro = None
     username = 'root'
     password = 'password'
+    smp = '2'
+    memory = '1024'
 
     def _set_distro(self):
         distro_name = self.params.get(
@@ -546,8 +548,8 @@ def _set_distro(self):
     def setUp(self, ssh_pubkey=None, network_device_type='virtio-net'):
         super().setUp()
         self._set_distro()
-        self.vm.add_args('-smp', '2')
-        self.vm.add_args('-m', '1024')
+        self.vm.add_args('-smp', self.smp)
+        self.vm.add_args('-m', self.memory)
         # The following network device allows for SSH connections
         self.vm.add_args('-netdev', 'user,id=vnet,hostfwd=:127.0.0.1:0-:22',
                          '-device', '%s,netdev=vnet' % network_device_type)