Redfish: Local variable overriding member variable

timer handler local variable defined in run() method is overriding
handler member variable.

Tested:
1) Verified BMC web is running and able to process requests

Change-Id: I6cd80dff16f3a932d8ada4fcf00917488e8ea936
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>