Expand arp_responder help text

Add additional text to arp_responder help to ensure that
proper documentation is included in the configuration guide.

Make ML2 and L2population references consistent.

Closes-Bug: #1321320

Change-Id: I0fc0691fc3729aa39888c90ca871ad7f711343f8
Fix bigswitch setup.cfg lines

Bigswitch was not correctly creating the bigswitch/ssl/ca_certs and
host_certs directories when running the setup.py install step.  This
makes it difficult to correctly package the plugin because it has
missing files/directories.

Fixes bug 1358982

Change-Id: I78c6e96887340ea90494ed9e109b3b7fda6653c9
corrects the typos in l3_router_plugin's comments

there were some typos in the docstring of the function
create_floatingip(). This patch corrects them

Change-Id: I869567d5470a27ff037feeabfc1057b8e2da38b7
Closes-Bug: #1359113
Remove unused network parameter from _allocate_ips_for_port

I found this in the context of a patch that I was reviewing [1].  I
found that patch left a few loose ends and so I thought it would be
better to remove the parameter as a separate refactor so that it can
be carefully reviewed.  The other patch [1] should be rebased to this
one.

[1] https://review.openstack.org/#/c/100963

Change-Id: I75115fa46ea3340ef0f13feb28ad2cdb0387fed7
Merge "Fix bigswitch setup.cfg lines"
Merge "Expand arp_responder help text"
Merge "corrects the typos in l3_router_plugin's comments"
Rename range to avoid shadowing the builtin

This refactor supports a patch I was reviewing [1].  I thought it
better to apply this consistently in this file as a separate refactor
so that that patch could be done cleaner.

[1] https://review.openstack.org/#/c/100963

Change-Id: Ida58758504e868dc731e97d7bce53d4849998723