tests/acceptance: skip multicore mips_malta tests on GitLab

For some reason these tests fail all the time on GitLab. I can
re-create the hang around 3% of the time locally but it doesn't seem
to be MTTCG related. For now skipIf on GITLAB_CI.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Cc: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Message-Id: <20200701135652.1366-29-alex.bennee@linaro.org>

tests/acceptance/machine_mips_malta.py

@@ -15,6 +15,7 @@ from avocado import skipUnless
 from avocado_qemu import Test
 from avocado_qemu import wait_for_console_pattern
 from avocado.utils import archive
+from avocado import skipIf
 
 
 NUMPY_AVAILABLE = True
@@ -99,6 +100,7 @@ class MaltaMachineFramebuffer(Test):
         """
         self.do_test_i6400_framebuffer_logo(1)
 
+    @skipIf(os.getenv('GITLAB_CI'), 'Running on GitLab')
     def test_mips_malta_i6400_framebuffer_logo_7cores(self):
         """
         :avocado: tags=arch:mips64el
@@ -108,6 +110,7 @@ class MaltaMachineFramebuffer(Test):
         """
         self.do_test_i6400_framebuffer_logo(7)
 
+    @skipIf(os.getenv('GITLAB_CI'), 'Running on GitLab')
     def test_mips_malta_i6400_framebuffer_logo_8cores(self):
         """
         :avocado: tags=arch:mips64el