API to set present property

The commit add an API into worker class to set present property
over DBus for a given FRU.

It also implements change to set present property as false in
case any failure

API to set present property

The commit add an API into worker class to set present property
over DBus for a given FRU.

It also implements change to set present property as false in
case any failure is detected in the process of collecting VPD for
the FRU.

Change-Id: I3faa988a0fb0886a6a28673439a46d6c22c16a32
Signed-off-by: Sunny Srivastava <sunnsr25@in.ibm.com>

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Revamped code for VPD parser

The commit removes all the pre-existing code from the branch
and pushes the revamped code.

Major modification includes:
- Movement from multi exe to single daemon model

Revamped code for VPD parser

The commit removes all the pre-existing code from the branch
and pushes the revamped code.

Major modification includes:
- Movement from multi exe to single daemon model.
- Multithreaded approach to parse FRU VPD.
- Better error handling.
- Refactored code for performance optimization.

Note: This code supports all the existing functionalities as it is.

Change-Id: I1ddce1f0725ac59020b72709689a1013643bda8b
Signed-off-by: Sunny Srivastava <sunnsr25@in.ibm.com>

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