Removed convertNeutronIDToKey(String) calls.

The convertNeutronIDToKey(String) method of BaseHandler class converts
Neutron ID.
Because PortHandler class just uses Neutron ID for log output, it does
not need to use convertNeutronIDToKey(String).

(cherry picked from commit 9e1468ded9db2fcfbf8dd0ed85e5f532ae9f4a3c)

Change-Id: I025b1db5cdc0c635a75a286f6eeb961c5233f7fa
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>
Merge "Removed convertNeutronIDToKey(String) calls." into stable/hydrogen