Increase number of active namespaces for formula test

The new formulas use the CHP meter in the grid formula, and in the CHP
formula, both of which are in different namespaces.

This change makes the same data available from two separate streams
from the mock_resampler.

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

tests/timeseries/_formulas/test_formula_composition.py

@@ -208,7 +208,7 @@ async def test_formula_composition_missing_bat(self, mocker: MockerFixture) -> N
 
     async def test_formula_composition_min_max(self, mocker: MockerFixture) -> None:
         """Test the composition of formulas with the min and max."""
-        mockgrid = MockMicrogrid(grid_meter=True, mocker=mocker)
+        mockgrid = MockMicrogrid(grid_meter=True, mocker=mocker, num_namespaces=2)
         mockgrid.add_chps(1)
 
         async with mockgrid, AsyncExitStack() as stack: