Pass vm-name to AddPort message.
      "vcenter-plugin.properties" file is renamed to "/etc/contrail/contrail-vcenter-plugin.conf"

Change-Id: I8ad3a9b696b1b0d5ae9446d7c27c3a0af2f9d2ee
Merge "      Pass vm-name to AddPort message.       "vcenter-plugin.properties" file is renamed to "/etc/contrail/contrail-vcenter-plugin.conf""