Modernize number literals

Use Python-3 compatible syntax, without breaking compatibility with py 2.7

- Octals literals start with 0o to prevent confusion
- The "L" at the end of large int literals is not required as they use
  long on Python 2 automatically.
- Using 'int' instead of 'long' for small numbers is OK in all cases except
  strict type checking checking, e.g. type(0).

https://fedorahosted.org/freeipa/ticket/4985

Reviewed-By: Jan Cholasta <jcholast@redhat.com>

install/share/copy-schema-to-ca.py

@@ -86,7 +86,7 @@ def add_ca_schema():
             root_logger.warning('Could not install %s: %s', target_fname, e)
         else:
             root_logger.info('Installed %s', target_fname)
-        os.chmod(target_fname, 0440)    # read access for dirsrv user/group
+        os.chmod(target_fname, 0o440)    # read access for dirsrv user/group
         os.chown(target_fname, pki_pent.pw_uid, ds_pent.pw_gid)