Increment version: open for new modifications
Fix syntax for notifies in unzip resource
Sonar 3.7 should use H2 instead of Derby as embedded database
Fix/cleanup service notifications for fresh installs and updates
Update to Sonar 3.7.4, latest of 3.7 branch
Systematically use symbols as map keys
Use single-quoted strings where possible
sonar.jdbc.validationQuery property is not used by Sonar as of version 3.2

https://jira.codehaus.org/browse/SONAR-3662
Remove sonar.jdbc.driverClassName

sonar.jdbc.driverClassName property was removed and JDBC driver class is guessed by connection URL for all supported databases.
See https://jira.codehaus.org/browse/SONAR-3045 and https://jira.codehaus.org/browse/SONAR-4362
Remove hardcoded backup configuration from database_mysql cookbook
Fix mysql recipe by making sure that directory for grant script is pre-created
Use node[:sonar][:dir] for all references to Sonar installation directory

Download and unzip directory is still hardcoded to /opt/sonar-x.y.z
Minor cleanup
Fix Sonar plugin updating logic

Download new plugins to extensions/downloads directory and let Sonar itself
move them to extensions/plugins and remove old plugin versions.

Fix file mode for downloaded plugins.
Prettify attributes file
sonar_plugin definition: extract variables
Add download_url parameter to sonar_plugin definition

Directly sets url for downloading plugin, to support downloading plugins
from urls that do not match default layout.
Single-quoted strings in metadata.rb
Support for building download URLs for plugins in subgroups.

Download URL can now look like
http://repository/path/plugin_group/plugin_name/plugin_version/plugin_name-plugin_version.jar
Temporary fix for default Nginx site on CentOS