Style and lint fixes to support newer ChefDK

Change-Id: I0f9d09d7cf465ad2c683fe7fc407dff2a8298800

README.md

@@ -10,7 +10,8 @@ https://wiki.openstack.org/wiki/Trove
 Requirements
 ============
 
-Chef 11
+- Chef 12 or higher
+- chefdk 0.9.0 or higher
 
 Cookbooks
 ---------

metadata.rb

@@ -1,6 +1,8 @@
 name 'openstack-database'
 maintainer 'openstack-chef'
 maintainer_email 'openstack-dev@lists.openstack.org'
+issues_url 'https://launchpad.net/openstack-chef' if respond_to?(:issues_url)
+source_url 'https://github.com/openstack/cookbook-openstack-database' if respond_to?(:source_url)
 license 'Apache 2.0'
 description 'Installs/Configures trove'
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))

spec/spec_helper.rb

@@ -9,17 +9,17 @@ SUSE_OPTS = {
   platform: 'suse',
   version: '11.3',
   log_level: ::LOG_LEVEL
-}
+}.freeze
 REDHAT_OPTS = {
   platform: 'redhat',
   version: '7.1',
   log_level: ::LOG_LEVEL
-}
+}.freeze
 UBUNTU_OPTS = {
   platform: 'ubuntu',
   version: '14.04',
   log_level: ::LOG_LEVEL
-}
+}.freeze
 
 shared_context 'database-stubs' do
   before do