Add Fedora 20 to IMAGE_URLS

Fedora 20 is only added to IMAGE_URLS if
$HEAT_FETCHED_TEST_IMAGE contains the exact known image name

This image is used for running heat tempest tests which require
an image which has heat-cfntools installed.

Change-Id: Ic6cdea932a5d5f3de138da96d27e407775b3e84b
Stop Neutron advanced service external processes

Some of Neutron advanced services (LBaaS, VPNaaS, ....) creates
external processes and they should be stopped in unstack.
This commit defines neutron_<XaaS>_stop functions for all services
and implements the cleanup logics if necessary.

Also cleanup_neutron removes netns used by LBaaS haproxy.

Change-Id: Ied3a2c374ffcb6b59ecaf1027fb6e6083eded2ae
Add ability to configure tempest tests based on network extensions

This patch introduces a Devstack variable to specify which network
extensions are enabled; this is useful for configuring tempest runs
when third-party plugins that do not support certain extensions.

Closes-bug: #1247778
Closes-bug: #1231152

Change-Id: Iee170993cb164502774f9ac4201b963d9a2715ba
Match RHEL Beta release strings

RHEL7 (in beta) has "Beta" after the release number and before the
code-name.  Add a number-match to the regex so everything between that
match and the codename in parenthesis is considered the release.

Change-Id: I992f20eedcefc6aeed6bd3ad57fc4cf20c8ef15d
Merge "Add ability to configure tempest tests based on network extensions"
Merge "Add Fedora 20 to IMAGE_URLS"
Merge "Match RHEL Beta release strings"
Merge "Stop Neutron advanced service external processes"
XenAPI: Update DomU to Ubuntu Saucy

Driven by a race condition in LVM being hit in the tempest
tests.  This is a locking race between a file lock and a
semaphore which is fixed in 2.02.96-5.

Change-Id: I8a8c215c90a0602288292ffd06b7694d2db6219e
Fix xenapi functions' tests

The tests got outdated, this fix makes the tests pass again.

Change-Id: Iadddfbf34bf79ba455811645e766c2f3d0fcca84
Workaround missing zip snapshot

At the moment, xenserver installation depends on github snapshots.
Unfortunately, git.openstack.org does not have that capability. This
fix includes:

 - Exit with error code, if a download fails
 - create proper urls, even if they are using the git protocol
 - set git base to github - so we are able to do snapshots

Fixes bug: 1259905

Change-Id: I8d0cf8bf8abb16ee0a4b138a6719409c75e7a146
HEAT_FETCHED_TEST_IMAGE may not be defined in some cases.

Some scripts that source stackrc use set -u, which will error
when unknown variables are accessed

Change-Id: I5af2d58475e1793dfa728b7ce9180fcbba1145e9