Refactored policy structure

Previously, all modules in an org were fully copied into that
org. Now, the only copy of the modules is at modpol.modules, and orgs
have a policy table at [org].policies, which overrides the config
table in any given module.

modpol_core/orgs/base.lua

@@ -14,7 +14,7 @@ function temp_org()
     return {
         id = nil,
         name = nil,
-        modules = modpol.util.copy_table(modpol.modules),
+        policies = {},
         processes = {},
         pending = {},
         members = {},
@@ -105,6 +105,9 @@ function modpol.orgs.init_instance()
     local instance = temp_org()
     instance.id = 1
     instance.name = "Root"
+    for i,v in pairs(modpol.modules) do
+       instance.policies[i] = {}
+    end
     
     setmetatable(instance, modpol.orgs)
 
@@ -183,7 +186,7 @@ function modpol.orgs:add_org(name, user)
     child_org.name = name
     child_org.parent = self.id
     child_org.processes = {}
-    child_org.modules = modpol.util.copy_table(self.modules)
+    child_org.policies = modpol.util.copy_table(self.policies)
     
     setmetatable(child_org, modpol.orgs)
 

modpol_core/orgs/process.lua

@@ -15,7 +15,7 @@ function modpol.orgs:call_module(module_slug, initiator, config, result, parent_
 
     local index = #self.processes + 1
 
-    local module = self.modules[module_slug]
+    local module = modpol.modules[module_slug]
 
     -- first applies any relevant org policies
     -- then overrides with the config values given on input
@@ -23,6 +23,11 @@ function modpol.orgs:call_module(module_slug, initiator, config, result, parent_
     if modpol.util.num_pairs(module.config) > 0 then
        for k, v in pairs(module.config) do
           new_config[k] = v
+          -- overrides with org policies
+          if self.policies[module_slug]
+             and self.policies[module_slug][k] then
+             new_config[k] = self.policies[module_slug][k]
+          end
           -- overrides with input settings
           if config and config[k] then
              new_config[k] = config[k]