added tests for sprint 2 and 3

tests/sprint2/test/sp2_invalid_multiple_params_no_as.alpha

@@ -0,0 +1,7 @@
+type rec: [integer: x; integer: y]
+type main: rec -> integer
+function test: main
+	
+test (arg, arg2) := {
+  	return 0;
+}