홍길동 / onos

 * Each cell-specific variable is explicitly listed
   in the cell config file:
   ONOS_CELL, ONOS_NIC, OC1-OC9, OCN, OCI, ONOS_FEATURES

 * Cleanup and bug fixes inside bash_profile:
   - Don't export explicitly OCI and ONOS_CELL, because those
     are now exported in the cell config file
   - unset ONOS_CELL, ONOS_NIC, ONOS_FEATURES (the last two weren't
     unset before)
   - The built-in "cell" function shows OC1 to OC9 instead of OC0-OC9;
     OC0 is never used/setup anywhere else

 * Added two new shell commands:
   - tools/test/bin/onos-lsit-cells : lists existing ONOS cell configurations
     It is the equivalent of the "cells" built-in bash command
   - tools/test/bin/onos-show-cell : shows the configuration of an ONOS cell
     It is the equivalent of the "cell" built-in bash command, but
     it can show also the configuration of any ONOS cell (not only
     the default one).

construct Interface objects based on PortAddresses from HostService.

No functional changes.

 * Description header formatting
 * Added missing new line at the end of a file
 * Removed extra new lines at the end of a file

Change-Id: Idbbce6a72b6f7fecc6691f2af68f4ce40b58ca34

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Change-Id: I3f3a36f2249c1ba36175ad81fa374f7d8ab89af1

- prep work for removing onos-core-hz-net bundle

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…g it. This will be used by the initial implementation of distributed host store

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