9dd553e12a
Fixes bug 1099099 In addition to this the code does the following: 1. validates if the port exists on the OVS when a port update event takes place 2. when a port is created the initial state is set as 'DOWN'. this is later updated by the agent when it is detected as up Change-Id: I917d4b5aa8df7395fcaa841d77083546478739d2