Fix wrong variable check in dump test suite

Changes:
     - Corrected varaible name

Fixes:
    Variable '${file_there}' not found.

Tested:
      Ran test suite test_bmc_dumps.robot

Change-Id: Iaf46b004d02d415f8de79921ec33c4ed65333ba7
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/managers/test_bmc_dumps.robot b/redfish/managers/test_bmc_dumps.robot
index 808bef0..4730bc9 100644
--- a/redfish/managers/test_bmc_dumps.robot
+++ b/redfish/managers/test_bmc_dumps.robot
@@ -85,7 +85,7 @@
      ${dump_file}  ${stderr}  ${rc}=  BMC Execute Command
      ...  ls ${BMC_DUMP_COLLECTOR_PATH}/${dump_id}
      Should Be True  ${rc} == 0
-     Should Start With  ${file_there}  BMCDUMP
+     Should Start With  ${dump_file}  BMCDUMP
 
 
 Verify User Initiated BMC Dump When Host Booted
@@ -294,7 +294,7 @@
 Get Disk Usage For Dumps
     [Documentation]  Return disk usage in kilobyte for BMC dumps.
 
-    ${usage_output}  ${stderr}  ${rc}=  BMC Execute Command  du -s ${BMC_DUMP_COLLECTOR_PATH} 
+    ${usage_output}  ${stderr}  ${rc}=  BMC Execute Command  du -s ${BMC_DUMP_COLLECTOR_PATH}
 
     # Example of output from above BMC cli command.
     # $ du -s /var/lib/phosphor-debug-collector/dumps