Create regulators NotAction class

Create the NotAction class that implements the "not" action in the JSON
config file.

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: I2ceb4c4c623ac11f2af5f1eabe5c83244c38d0cf
diff --git a/phosphor-regulators/test/meson.build b/phosphor-regulators/test/meson.build
index 7157fd6..830564c 100644
--- a/phosphor-regulators/test/meson.build
+++ b/phosphor-regulators/test/meson.build
@@ -11,6 +11,7 @@
 
     'actions/action_environment_tests.cpp',
     'actions/action_utils_tests.cpp',
+    'actions/not_action_tests.cpp',
     'actions/run_rule_action_tests.cpp',
     'actions/set_device_action_tests.cpp'
 ]