Merge pull request #1014 in SNORT/snort3 from policy_split to master

Merge pull request #1014 in SNORT/snort3 from policy_split to master

Squashed commit of the following:

commit 0770342be4f4da6ec65d0719ba97b39d6f96b464
Author: Carter Waxman <cwaxman@cisco.com>
Date:   Tue Sep 19 11:26:00 2017 -0400

    unified2: implemented ips, network, and inspection policy id logging

commit c2ecc2df0f84a87bc9ed76b7815096013fda8c55
Author: Carter Waxman <cwaxman@cisco.com>
Date:   Mon Sep 18 13:04:16 2017 -0400

    appid pop3, appid imap: fixed missing include

commit c01713fbe13151f5b9d2f7519f916a104eb5e3fd
Author: Carter Waxman <cwaxman@cisco.com>
Date:   Thu Sep 14 13:06:20 2017 -0400

    snort2lua: config policy_id converts to when ips_policy_id

    This is an interim support to generate loadable configs until
    proper ips / network / inspection differentiation is added.

commit 22147f8cd90ec44794aa3089fbc5308d86a20339
Author: Carter Waxman <cwaxman@cisco.com>
Date:   Thu Sep 14 11:35:11 2017 -0400

    Shell: force default policies for shells not from binder

commit b50ea6e9dfff279c80427fd806341d578f32feca
Author: Carter Waxman <cwaxman@cisco.com>
Date:   Wed Aug 30 13:50:19 2017 -0400

    Binder, Flow, PolicyMap, Shell: enabled policy splitting by type