Move some comments of variables to right place

setup_develop*() in functions has been moved to functions-common. But
some comments about the variables are still left.
This commit moves it to the right place.

Change-Id: Ic360454f1ee72f51c9979d0468dee0913e9b32e4
Source lib/neutron in boot_from_volume.sh

Without lib/neutron, boot_from_volume.sh generates the following
error:

  + _ping_check_neutron private 10.11.12.5 30
  /devstack/functions: line 356: _ping_check_neutron: command not found

Change-Id: Ib72c3f24d614570d69bf5dda35cbaf5847b1d1b9
nova changes for multinode working under -o errexit

There was a stray inicomment on paste outside of a nova-api block. This
fails under -o errexit because the paste.ini doesn't exist.

Move this to inside the correct block.

Change-Id: Iffbdae6716a1c2a8f650b68edd4faf436434eab1
Merge "Source lib/neutron in boot_from_volume.sh"
Merge "nova changes for multinode working under -o errexit"
Merge "Move some comments of variables to right place"
Merge branch 'master' of github.com:openstack-dev/devstack