Fix resource missing import for BMC dump test suite

Error from CT run

Verify_Dump_After_Host_Watchdog_Error_Injection
Message:
Keyword 'Is Host Rebooted' failed after retrying for 5 minutes.
        The last error was: No keyword with name 'Is Host Rebooted' found.

Change-Id: I78b1ed4329123bc94592b70148a080ef2330b798
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/extended/test_bmc_dump.robot b/redfish/extended/test_bmc_dump.robot
index c5ef2d8..bea38f7 100644
--- a/redfish/extended/test_bmc_dump.robot
+++ b/redfish/extended/test_bmc_dump.robot
@@ -7,6 +7,7 @@
 Resource            ../../lib/dump_utils.robot
 Resource            ../../lib/boot_utils.robot
 Resource            ../../lib/utils.robot
+Resource            ../../lib/state_manager.robot
 Library             ../../lib/bmc_ssh_utils.py
 
 Test Setup          Open Connection And Log In