forced evaluation of the Node Attribute.

"developer_mode" should only be used if it is true.
Merge pull request #40 from cloudnull/DE199-grizzly

Merged automatically by jenkins after successful build test
Add fixed_ip_disassociate attributes

Adding attributes for both fixed_ip_disassociate_timeout
and dhcp_lease_time. In nova-network on Folsom, setting
the disassociate timeout also requires modifying the lease
timeout as well, otherwise dnsmasq will disassociate the IP
when the lease expires.
Merge pull request #42 from DavidWittman/fixed-ip-disassociate

Add fixed_ip_disassociate_timeout attributes
Adds indexinf for hosts in agents.
changed action for adding index from method to `delayed`
removed index method due to possible race conditions
added indexing method
removed addin, was not needed.
db indexing added as library method.
updated index create to use library method
Merge pull request #45 from cloudnull/DE167-Grizzly

Merged automatically by jenkins after successful build test
add a cron job to run quantum-netns-cleanup every night
Merge pull request #46 from rackerjoe/grizzly

Merged automatically by jenkins after successful build test
Allow zero vlans in network_vlan_ranges

In configurations which use flat network types, the templates
must still include the provider interface name in network_vlan_ranges
in order for quantum-server to recognize the device, regardless of
whether or not a VLAN is being used.
Add Quantum dhcp_domain attribute

Allows users to override the domain which is provided to instances
Merge pull request #47 from DavidWittman/quantum-dhcp-domain

Add Quantum dhcp_domain attribute
Fix quantum attributes to work with centos.
Merge pull request #49 from git-harry/grizzly

Merged automatically by jenkins after successful build test
Merge pull request #48 from DavidWittman/quantum-flat-network-fix

Allow zero vlans in network_vlan_ranges