Fix import order

(cherry picked from commit 8dfdaf7)

Author: peternewman

tools/rdm/list_rdm_tests.py

@@ -24,9 +24,10 @@
 import sys
 import textwrap
 
-from ola import PidStore
 from ola.RDMConstants import RDM_MAX_PARAM_DATA_LENGTH
 
+from ola import PidStore
+
 __author__ = 'Peter Newman'