add cable connected & not-connected event

Add the event to be generated when an expected cable is connected and
not connected to a specific port.

Change-Id: I9991372c53a25e4480d1944cd91006ec8850fc3

add cable connected & not-connected event

Add the event to be generated when an expected cable is connected and
not connected to a specific port.

Change-Id: I9991372c53a25e4480d1944cd91006ec8850fc33
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>

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