Make tests independent of the default value for --experimental_ui

In preparation of experimental UI becoming the default UI for bazel,
change some tests that depend on specifics of the current UI to explicitly
specify the UI to use.

Change-Id: If976c3eccd19c4a523c7eb1b4c4355ab2e5f9371
PiperOrigin-RevId: 172340189

src/test/py/bazel/action_temp_test.py

@@ -116,8 +116,11 @@ def _CreateWorkspace(self, build_flags=None):
 
   def _SpawnStrategies(self):
     """Returns the list of supported --spawn_strategy values."""
-    exit_code, _, stderr = self.RunBazel(
-        ['build', '--color=no', '--curses=no', '--spawn_strategy=foo'])
+    # TODO(b/37617303): make test UI-independent
+    exit_code, _, stderr = self.RunBazel([
+        'build', '--color=no', '--curses=no', '--spawn_strategy=foo',
+        '--noexperimental_ui'
+    ])
     self.AssertExitCode(exit_code, 2, stderr)
     pattern = re.compile(
         r'^ERROR:.*is an invalid value for.*Valid values are: (.*)\.$')
@@ -141,8 +144,9 @@ def _ReadFile(path):
     self.AssertExitCode(exit_code, 0, stderr)
     bazel_bin = stdout[0]
 
+    # TODO(b/37617303): make test UI-independent
     exit_code, _, stderr = self.RunBazel([
-        'build', '--verbose_failures',
+        'build', '--verbose_failures', '--noexperimental_ui',
         '--spawn_strategy=%s' % strategy, '//foo:genrule', '//foo:skylark'
     ])
     self.AssertExitCode(exit_code, 0, stderr)