* Move quantum installation to lib/quantum
* Refactor quantum configuration
* Move Quantum service account creation from keystone_data.sh to lib/quantum
* Define generic functions to install third party programs
* Minor cleanups related to Quantum
* Kill dnsmasq which watches an interface 'ns-XXXXXX' in unstack.sh
* Set default_floating_pool in nova.conf to make default flaoting pool
work when PUBLIC_NETWORK_NAME is other than 'nova'
* Make tempest work even when PRIVATE_NETWORK_NAME is other than 'private'
Change-Id: I4a6e7fcebfb11556968f53ab6a0e862ce16bb139