Addition of module - cisco-xe-driver.

Addition of module - cisco-xe-driver.

The cisco-xe-driver is responsible for creating forwarding constructs
in cisco devices with IOS XE Operating System.

Developer's Certificate of Origin 1.1

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Change-Id: I290c14046969dfa3f2b597a78376a4368da50045
Signed-off-by: Marek Ryznar <marek.ryznar@amartus.com>
Signed-off-by: Donald Hunter <donaldh@cisco.com>