XF3-2891: Querying Device.WiFi. via dmcli.
XF3-2891: Querying Device.WiFi. via dmcli.

Reason for change: Failed to get parameter value of X_CISCO_COM_ConfigFileBase64.
Test Procedure: Verify unit test.
Risks: Low
Signed-off-by: jineesh_augustine@comcast.com

(cherry picked from commit d2c7bf92d271d18fdffb8bee4cc8677cd519fbe8)

Change-Id: I4ee3e52046d5bbfed69faeed2fb468b9f8dc693b

rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent