Adds some network parsing for baremetal deployments and other fixes

Adds some network parsing for baremetal deployments and other fixes

Changes include:
 - Fixes Intel Pod 2 inventory file
 - Check for DHCP server on the host and disable
 - Adds realistic+common network-settings file
 - Modifies baremetal deployments to bridge to correct interface
 - Adds private/storage network OVS bridges
 - Parses network-settings into valid network-environment variables
 - If certain network-settings are missing they will be auto-detected

Note: The actual settings set forth for deployment only include
admin/external networks at the moment.  Private/storage networks will be
handled in an upcoming patch.

JIRA: APEX-50

Change-Id: I0a1a86f37c08702a93fe167688c3149ba5573db4
Signed-off-by: Tim Rozet <trozet@redhat.com>