Fix deleting nodes not showing in updates.
nova_network_dhcp_name is a node fact, not cluster fact, so can't be rendered in environment template
Merge pull request #437 from mattt416/fix_template_error_due_to_missing_fact

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Reverting 0000596176 since it's adding double-quotes around all values
Merge pull request #438 from mattt416/revert_0000596176

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Fix deleting nodes not showing in updates.
Add test for - Fix deleting nodes not showing in updates.
Merge branch 'sprint' of github.com:git-harry/opencenter into sprint
PEP8 fixes.
Merge pull request #439 from git-harry/sprint

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Tidy up how invalid ids are handled.
Merge pull request #440 from git-harry/sprint

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Serialize non-string facts
CYA w/ a tidy little basestring
Clean up pep8 failure
Merge pull request #441 from mattt416/serialize_if_necessary

Merged automatically by jenkins after successful gate test