Fix error when attributes don't exist at all

Issues DE186
Fix newer foodcritic thinking spec is a cookbook

Issues DE186
Merge pull request #99 from claco/DE186

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forced evaluation of the Node Attribute.

"developer_mode" should only be used if it is true.
Merge pull request #100 from cloudnull/DE199-grizzly

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Move the mod_ssl recipe from horizon to osops-utils
Merge pull request #101 from andymcc/sslerate

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Add ssl.conf.erb as required
Merge pull request #102 from andymcc/sslerate_erb

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install common packages for all roles
Merge pull request #103 from mancdaz/grizzly

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add python-keystone to the common packages
Merge pull request #104 from mancdaz/grizzly

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added index method into available methods.
Merge pull request #105 from cloudnull/DE167-Grizzly

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Merge branch 'grizzly' of github.com:rcbops-cookbooks/osops-utils into grizzly
Don't override host in get_bind_endpoint.

Also remove unused get_env_bind_endpoint.