Convert codomain to a class

Convert the codomain to a class, and the policy lists that store
codomains to stl containers instead of glibc twalk.

Signed-off-by: John Johansen <john.johansen@canonical.com>
[tyhicks: Merge with dbus changes and process_file_entries() cleanup]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Steve Beattie <steve@nxnw.org>

parser/parser_symtab.c

@@ -542,6 +542,9 @@ void free_symtabs(void)
 }
 
 #ifdef UNIT_TEST
+
+#include "unit_test.h"
+
 int main(void)
 {
 	int rc = 0;