Assert ElementsMatch instead of Equal for slices returned by Discover…

…VTGates in discovery_static_file_test.go

Signed-off-by: Sara Bee <855595+doeg@users.noreply.github.com>

go/vt/vtadmin/cluster/discovery/discovery_static_file_test.go

@@ -225,7 +225,7 @@ func TestDiscoverVTGates(t *testing.T) {
  }
 
  assert.NoError(t, err)
- assert.Equal(t, tt.expected, gates)
+ assert.ElementsMatch(t, tt.expected, gates)
  })
  }
 }