Fix missing test

All test files must end in _test.py or they don't get
executed

Change-Id: If3a46a66570f7d07d0e93de72438a8a46b3e0a22
Signed-off-by: Mark Beierl <mark.beierl@emc.com>

diff --git a/storperf/tests/utilities/dictionary.py b/storperf/tests/utilities/dictionary_test.py
similarity index 100%
rename from storperf/tests/utilities/dictionary.py
rename to storperf/tests/utilities/dictionary_test.py