Enhancing misguiding error trace

- There are some of the listed paths below which don't have "Present"
property. Due to this, the FRU present property check was throwing
"Resource not found" error which misguides the user.

- The commit adds support to fix this misguiding error trace.

Paths:
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan0/fan0_0
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan0/fan0_1
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan1/fan1_0
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan1/fan1_1
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan2/fan2_0
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan2/fan2_1
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan3/fan3_0
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan3/fan3_1
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan4/fan4_0
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan4/fan4_1
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan5/fan5_0
/xyz/openbmc_project/inventory/system/chassis/motherboard/fan5/fan5_1

Change-Id: I5a8fae3a5dbae428f14ccc90aeba8319a48c11b2
Signed-off-by: Kamalkumar Patel <kamalkumar.patel@ibm.com>