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
add libxslt1-dev to tempest required files

tempest actually needs a pretty new lxml, which means it's
going to build it from source. To do that it needs libxslt1-dev
to compile. We should be good and let devstack do this out of
the box so it works on minimal environments.

Change-Id: Ia527905c1c15fb8c6793f0ce543ad05e25a88179
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 libxslt1-dev to tempest required files"
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"