Force "use_vlan" to false on nova_fixed when using vlan modes

When ovs is used in vlan-mode quantums sets up an ovs-bridge to do the vlan
tagging. That bridge needs be attached to a none VLAN interface in order to
work correctly.

When linux-bridge is used quantum's linux bridge agent will create the correct
vlan interfaces automatically.
Add support for using the quantum cisco plugin
Add condition to ceilometer notifier in nova.conf
Ceilometer notifier will be added only if ceilometer is installed
Merge pull request #217 from rhafer/fix/ovs-vlan

https://github.com/crowbar/barclamp-nova/pull/217

Merged by devtool for ArkadyKanevsky
Merge pull request #223 from rhafer/fix/cisco-support

https://github.com/crowbar/barclamp-nova/pull/223

Merged by devtool for ArkadyKanevsky
Merge pull request #226 from MirantisDellCrowbar/DCB-158/pebbles/master

Add condition to ceilometer notifier in nova.conf
Merge pull request #234 from jtwill98/pull-req-release-roxy-master-17620546f850dd64dddb20c9c812824cc5589804

Merge of Latest Pebble commits into Roxy [1/13]
Merge DE1227 - Move Pull from source to the bottom of each proposal
DE#1191 - nova-manage command failed because of directory permission preventing the reading of nova.conf -- resolves nagios warning issues
modified directory block for /etc/nova to change permissions to 0755
Merge pull request #235 from cdearborn/pull-req-release-roxy-master-dba21dd466c13e36b30e209718e24953a44f13f8

Merging bug fix from mesa to roxy [1/1]
handle git dependency
default pfs settings
Merge pull request #236 from dpaterson/pull-req-release-roxy-master-a4ac8c5614fca7cda0ebba6ac5ff3469aaa98c5f

https://github.com/crowbar/barclamp-nova/pull/236

Merged by devtool for ArkadyKanevsky
venv is should not be set only in case of PFS
only active git proposal is suitable for PFS deployment
Merge pull request #237 from MirantisDellCrowbar/feature/pfs-ui/roxy/master

https://github.com/crowbar/barclamp-nova/pull/237

Merged by devtool for ArkadyKanevsky