Add missing resource file

Resolves  openbmc/openbmc-test-automation#1271

Change-Id: I009f69cdc4877fab142213f284017e4f4e92f89b
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_sbe_side_switch.robot b/tests/test_sbe_side_switch.robot
index 926bca5..b936b8a 100644
--- a/tests/test_sbe_side_switch.robot
+++ b/tests/test_sbe_side_switch.robot
@@ -5,6 +5,7 @@
 Library             ../lib/utils.py
 Variables           ../data/variables.py
 Resource            ../lib/boot_utils.robot
+Resource            ../lib/state_manager.robot
 
 Test Setup          Test Setup Execution
 Test Teardown       Test Teardown Execution