Allow ceilometer to use redis for coordination

If redis is desired by local.conf via CEILOMETER_COORDINATION_URL
then make sure redis is installed and restarted.

Change-Id: Idfb7b902478049fbc240bf416db6c7d6acd67a51
Set permissions on sahara cache

Signing certificate directory should have 700 mode.
Before the change it was created with 755.

As a visual impact this CR removes warning from 
keystonemiddleware.

Change-Id: I8483e73447348b9a9e33dfd382543978a70a9d43
Closes-Bug: #1387416
Add iptables rule for Ironic VMs -> Swift

The agent ramdisk gets instance images from swift, set firewall
rules to allow this.

Also configure Ironic API port using the correct variable, and
use SWIFT_DEFAULT_BIND_PORT for Swift ports everywhere.

Change-Id: Ieec8cc64e504b04a21daa49e90e2d4925f4838ee
Workaround openrc failure on zsh

The recent GIT_DEPTH change introduced a [[ ]] construct
which doesn't work for zsh 5.0.2.  Workaround it by tweaking the test.

The following is a demonstration to show how zsh behaves:

    % if [[ "" ]];then echo hoge;fi
    zsh: parse error near `]]'
    % if [[ "x" ]];then echo hoge;fi
    zsh: parse error near `]]'
    % if [[ -n "" ]];then echo hoge;fi
    % if [[ -n "x" ]];then echo hoge;fi
    hoge
    %

Closes-Bug: #1387943
Change-Id: Ia88de876dacb3664a7c3d8f5a035e8e50fddb678
added the localrc section to the local.conf

Change-Id: Iffcc61ca886df96e1dc7c0df3c02125cb2b4a7dc
Only sysctl reserverd ports when available.

Only set the keystone reserved ports when available, on some system
(like when running under containers) where this sysfs interface is not
exposed we are almost pretty sure these ports would be exclusive for our
devstack.

Change-Id: I06d7d227ae94d564c91c16119e4bbbcc6564a280
USe `trueorfalse` for INSTALL_TESTONLY_PACKAGES

INSTALL_TESTONLY_PACKAGES is assumed to be set to `True` or `False`.
However, in devstack-gate this variable is set to 0 or 1. The patch uses
the already existing `trueorfalse` function to evaluate
INSTALL_TESTONLY_PACKAGES and normalize its value.

Change-Id: I0e4a31e422bad2a31d919d9f871e24833a0faa99
Merge "Allow ceilometer to use redis for coordination"
Merge "Add iptables rule for Ironic VMs -> Swift"
Merge "Workaround openrc failure on zsh"
Merge "Set permissions on sahara cache"
Merge "added the localrc section to the local.conf"
Merge "USe `trueorfalse` for INSTALL_TESTONLY_PACKAGES"
Merge "Only sysctl reserverd ports when available."
Merge branch 'master' of https://github.com/openstack-dev/devstack