Clear additional global state between unit test runs

Clears out some global state that was being left over between unit tests runs, causing indeterminate results when running multiple tests against data at the global scope.

src/base/api.lua

@@ -674,10 +674,23 @@
 -- individual test runs.
 ---
 
+	local numBuiltInGlobalBlocks
+
 	function api.reset()
+		if numBuiltInGlobalBlocks == nil then
+			numBuiltInGlobalBlocks = #api.scope.global.blocks
+		end
+
 		for containerClass in p.container.eachChildClass(p.global) do
 			api.scope.global[containerClass.pluralName] = {}
 		end
+
+		api.scope.current = api.scope.global
+
+		local currentGlobalBlockCount = #api.scope.global.blocks
+		for i = currentGlobalBlockCount, numBuiltInGlobalBlocks + 1, -1 do
+			table.remove(api.scope.global.blocks, i)
+		end
 	end