regulators: Add SensorMonitoring::execute()

Implementation and Testing for SensorMonitoring::execute().

Signed-off-by: Bob King <Bob_King@wistron.com>
Change-Id: If2b39b70997cd5cb84adc6c4b601d87556b82f55
diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index 4adeb58..6f067b5 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -13,6 +13,7 @@
     'id_map.cpp',
     'pmbus_utils.cpp',
     'rail.cpp',
+    'sensor_monitoring.cpp',
     'system.cpp',
 
     'actions/if_action.cpp',